2009 Graduating Seniors/Juniors Leaving Early

ok, ok...I realize we still have Indiana and MSU to play plus some second-tier bowl game, but Flounders had an article today about who is graduating (Clark, Landolt, Odrick, Lee) of significance then also went on to discuss Bowman and Royster leaving early.
What do you guys think? Obviously both Juniors are NFL-caliber but both have already dealt with some injuries.
I guess Bowman is rated 13th best NFL-prospect right now (granted, that's by Todd McGay) and Royster is 50th.
I think Royster will be counted on moreso next year but teams will be keying on him since Newsome won't be nearly the same caliber passing threat as Clark is. SO Royster could either rack up huge rushing yards or be stymied due to 8-man boxes all year.
Bowman? He had a huge year last year and flashes of brilliance this year. His injury and poor tackling at times (see: Ohio State game) may have dropped his stock though. Does it make sense for him to come back?????
As for the graduating guys - I think we'll be ok on the D-line and Landolt won't be missed. Lee and Clark are going to be HUGE leadership voids though. I wonder who steps in?