I think there are a lot of possibilities for early entries - This is something I've been looking at for a while actually.
KU - Most fans are expecting Rush, Arthur, and possibily Chalmers to be gone (especially with the signing of Appleton). Robinson, Kaun, Jackson, Stewart, and Case all graduate.
UT - Augustine is probably gone. I would say that I think James might be gone but he's a tweener at the next level and might be a four year player. No seniors of note leaving.
KSU - Beasley and Walker are gone. Most places still have Walker in the first round. Young and Stewart graduate. I honestly think Sutton and Pullen step in nicely for Young and Stewart but Beasley and Walker leave big holes in the frontcourt.
BU - really only loses Bruce to graduation and he isn't as big a factor for them this year.
OU - Griffen is probably gone. Longar and Godbold are gone. Could be a different team next year, although they bring in the super talented Willie Warren.
A&M - Jordan is probably gone. They lose Jones and Kirk to graduation. They are going to also look a lot different on the inside next year.
NU - Obviously they lose Maric, who I think is their only senior of signifcance. Although he is a huge part of that team.
OSU - Not losing any early entrants, but do lose DPOY Marcus Dove. Extremely young team, could be a riser next year.
TT - Lose Zeno (finally) and Burgess. Very young team though.
MU - Lose Hannah, Lyons, Brown, Butterfield, Horton, Volkus. They'll be a completely different team next year and they have a huge recruiting class even if there aren't any top 150 guys in there.
CU - Silas kicked off the team, Roby and Hall are gone, King-Stockton is gone... it seems like they are going to have the 12th spot locked down for a while.
If you looked at the graduates and early entrants, it looks like the Big 12 is losing a lot of quality rebounders and post players. Post play is going to be considerably weaker in the Big 12 next season which is a very good thing for us considering we lose our best post player and two best rebounders.