I'm taking the offensive half of the recruiting analysis from Sean, because quite frankly, I haven't posted in a while, and I like to think I know what I'm talking about when it comes to analyzing kids (although I would like to say that I actually DO know more about two of these kids than you probably do for personal reasons, more info when I get to them).  Obviously, the offensive half of the recruiting class could still use, oh, I don't know, one more 6'6'' quarterback that runs a 4.4 and is constantly compared to Vince Young.  I won't say any names, but lets just say for a kid who delayed his signing to visit Penn State and Oregon, it sure looks good on our end of the spectrum.  Since there are no guarantees in the world of recruiting, I'll handle this post with only references to players that we KNOW are going to be Buckeyes.

Oh, and by the way, the best players that Jim Tressel got this year were James Laurinaitis, Brian Robiskie, Malcolm Jenkins, Marcus Freeman, and Alex Boone.

Since there are discrepancies as to just where some players will end up offensively (Thomas, Stoneburner), I am going to characterize the recruits just like the Buckeye coaches do, into three categories: Speed, Big Speed, and Power players.

Speed

DeVier Posey
Scout: #4 WR * * * * * Rivals: #3 WR * * * * *
Army All-American
The Buckeye's top wide receiver prospect in this year's class, DeVier Posey is a fantastic blend of size, speed, and ability that Todd Boeckman did not have the pleasure of throwing to last year.  If he pans out, Posey very well could end up being the "perfect" receiver.  His size (6'3" 190 lbs) puts him right on par with Brian Robiskie with room still to grow, but his athleticism and ability to gain separation in addition to his natural talents as a receiver are what sets him apart from the rest of the current Buckeye receivers.  He's also an all-state track and field performer.  Posey is the top receiver prospect the Buckeyes have seen in quite some time, and there's no reason to believe that he won't be a superstar one day.
Best comparison: A faster Brian Robiskie
In 2008 he will: Find a way on the field

Lamaar "Flash" Thomas
Scout: #10 RB * * * * Rivals: #4 ATH * * * *
Army All-American
At this point in time, there's no telling how Tressel is going to utilize Thomas.  Many recruiting services list him as a running back, but at 5'11" 184 lbs, he would never be able to last past ten carries a game in the Big Ten, and I think Tressel recognizes that.  He could also end up at wide receiver, but he's too athletic to put him in a spot where he might only see the ball a few times a game.  Expect Thomas to be used in a "gimmick" like role where he will be utilized in any way, shape, and form that Tressel can manage.  That means running, receiving, trick plays, returns, you name it.  Rivals lists Thomas as the fastest Athlete in the country, which means since he's not in the SEC he's really only half as fast.  Expect the "ShotGinn" formation to make a return the Buckeyes offense with Thomas and/or Ray Small in the backfield, which will likely lead to some variance of a spread offense in Columbus.
Best Comparison: Percy Harvin
In 2008 he will: Play, perhaps immediately

Ben Buchanan
Scout: #4 K * * * Rivals #3 K * * *
Army All-American
Okay, so is Buchanan really a "speed" player?  No.  But he's more of a speed guy than a Big Speed or Power player, so he's automatically allocated to this category.  Essentially, what you need to know about Buchanan is that he was the first person to commit in this class, and that he has received kicking and punting lessons from Mike Nugent and Andy Groom.  Take it for what it's worth, but this guy will make Special Teams relevant once again in Columbus.  He very well may end up taking both the kicking and punting duties, and do it sooner rather than later.
Best Comparison: Mike Nugent, why the hell not?
In 2008 he will: Redshirt

Big Speed

(Top space reserved for final commitment of '08 class)

Jake Stoneburner
Scout #4 TE * * * * Rivals #3 TE * * * *
Army All-American
I started writing about sports because I learned at a fairly early age that I didn't have much business playing them, and we all can thank Mr. Stoneburner for that one.  I have had the pleasure of having my rear end handed to me in just about every sport I've ever played mainly because of this 6'5" 220 lb. manchild that can run a 40 yard dash in under 4.5 seconds.  Due to his size, most recruiting services list him as a tight end, but the Buckeye coaches are already on record saying that the kid will be a receiver, mainly because he can burn rubber.  Thanks to his rare mix of size and speed, Stoneburner has an innate ability to gain separation and maintain fantastic ball skills.
Best Comparison: Roy Hall
In 2008 he will: I think he will redshirt, but he has the physical tools to play right away

Jermil Martin
Scout: NR FB * * Rivals: NR FB * * *
All-Ohio
Along with Shaq Rowell, Jermil Martin continues the Cleveland Glenville Pipeline that Jim Tressel has created at Ohio State.  Despite what many people think about Martin, he was brought in to this class exclusively as a fullback.  He is a big, bruising back that isn't afraid to play physical (his All-State selection was actually for his play on the defensive line), but as far as being a full-time tailback, Martin just simply is not OSU material and would not fit into this class had it not been for the team's dire need for a fullback.  He may get an occasional carry here or there, but his primary role on the team will be to lead block for whoever else gets the ball.  Having said all that, however, I still think there is a strong chance that Martin ends up being one of the best fullbacks in the Tressel era.  Just like most Glenville players, he will probably be ready to go from day 1, and with the current lack of depth at fullback, that may be needed.
Best Comparison: Dionte Johnson
In 2008 he will: I'm not making any guarantees, but I think he'll see the field.

Nic DiLillo
Scout: #39 TE * * * Rivals: #28 TE * * *
Unlike Stoneburner, DiLillo will almost certainly be brought in strictly as a tight end.  After swinging and missing on a few other blue chip prospects, Tressel was finally able to find a Buckeye in DiLillo.  He won't fool anybody with his speed or athleticism, but he is definitely a grade-A Tressel tight end: A sure-handed, bruising blocker that will help create lanes for the runner.  I personally do not see DiLillo ever becoming a huge factor in the passing game, but he should still contribute quite a bit to the offense before it is all said and done.
Best Comparison: Rory Nicol
In 2008 he will: Redshirt

Power:

Mike Adams
Scout: #2 OT * * * * * Rivals: #1 OT * * * * *
Army All-American
The three offensive linemen that the Buckeyes reeled in were without a doubt the cornerstones of the 2008 recruiting class.  Between Adams, Brewster, and Shugarts, all three could be starting by their sophomore years and make be making millons not too long from now.  Adams very well may be the best of the bunch.  After sulking around the bottom of the Rivals100, he shot up to the #3 player in the country after putting on one of the most dominating Army All-American bowl performances in recent memory.  Adams has been a man amongst boys for the better part of his high school days, and is arguably the most athletic and polished lineman to come out of the state of Ohio since Orlando Pace.  Look for Adams to be polished into the left tackle spot after Boone graduates.
Best Comparison: Korey Stringer
In 2008 he will: See enough time to warrant significant time in `09

JB Shugarts
Scout: #7 OT * * * * * Rivals: #11 OT * * * *
Army All-American
Of all of the Buckeye commits, I give Shugarts the best chance to play and start early.  After playing in the All-American Bowl, Shugarts immediately enrolled at OSU with Mike Brewster and started taking classes and working out in January.  In addition to the gained experience from joining early, Shugarts also has the luxury of playing right tackle, the same position vacated by Kirk Barton.  Behind Bryant Browning (Barton's immediate replacement) there is a whole lot of gray area as to just who else is a capable right tackle, and if nobody else steps up, the Houston native will almost certainly get his licks.
Best Comparison: Alex Boone, but hopefully more consistent.
In 2008 he will: Play, maybe even start

Mike Brewster
Scout: #1 C * * * * * Rivals: #4 OT * * * * *
Army All-American
Last Spring Break, I was fortunate enough to meet a kid my age who was a fantastic football recruit, being looked at by schools all over the country.  That kid? '08 Buckeye commitment Willie Mobley ( Proof ).  After talking with Mobley, he told me that he had the luxury of going up against Adams, Shugarts, and Brewster at the Army All-American Combine that winter in 1-on-1 drills.  Of those three, Mobley was emphatic in telling me that he believed Brewster was the best of the three, and he very well may be right.  To quote a Buckeye blog back when Brewster committed, "When they were handing out the nasty, Mike Brewster got in line twice," which very well may be the most accurate statement about him.  Watching his film, I have never been more impressed with a lineman's ability to just plow through the opposition.  Some sites say he's a tackle, but with Adams and Shugarts in the fold, it's hard to imagine the namesake of the "Brew Crew" ending up anywhere but manning the trenches at center.
Best Comparison: Nick Mangold
In 2008 he will: Play, assuming his shoulder heals quickly