Depending on who leaves, the PAC-10 can have a bunch of first rounders:
Arizona - Bayless, Budinger
ASU - Harden
Cal - Anderson, Hardin
Stanford - Lopez x 2
Oregon - Leunen
UCLA - Love, Collison, Westbrook
usc - Mayo, Jefferson, Gibson
Possibly 14 first rounders out of the PAC-10 if they all leave this year. Some may stay (Harden, Budinger), and others are borderline first rounders (Hardin, Robin Lopez)....but there is no denying that there's A LOT of talent in this conference.
College coaches have been the first to acknowledge the tremendous amount of talent in the P10 this year.
NBAdraft.net (who's been better than most with the accuracy of their mock drafts) has the following, with a very TENTATIVE/EARLY list:
Brook Lopez, Soph C (Stan) - #3 to Memphis
Jerryd Bayless, Frosh G (Az) - #4 to Seattle
Russell Westbrook, Soph G (UCLA) - #8 to Indiana
OJ Mayo, Frosh G ($C) - #9 to Charlotte
Kevin Love, Frosh C/F (UCLA) - #16 to Philadelphia
Darren Collison, Jr. G (UCLA) - #17 to Washington
Kyle Weaver, Sr. G (WSU) - #25 to New Orleans
DeVon Hardin, Sr. C (Cal) - #29 to Detroit
So there you have 8, including three Bruins (which I don't think anyone will dispute). No one has Cal's Anderson (P10 leading scorer) coming out, very few have Robin Lopez, James Harden, Chase Budinger of Arizona coming out, and Leunen won't be drafted but will sign as a free agent or go to Europe.
In the second round, that mock has Bryce Taylor and Malik Hairston of Oregon (seniors), Josh Shipp and Luc Mbah a Moute of UCLA (not sure if I agree that either of them comes out), Taj Gibson of $C (who'll have to come out when his grades come forward), and Derrick Low of WSU (senior). So that gives the conference 14 players in the 60 selections. Still, an impressive 23.3% of the choices, or almost one in four.
Collison is in about the best position I think, because he'll be taken after Westbrook, and he'll drop to a better team with a big need at the point, like the Celtics. Though DeVon also may be in the same circumstance and hook up with a team where he can learn the ropes but not be counted on as a savior.