They are: Jim Chen, current Dean at Louisville; Lawrence Gostin, Associate Dean and a leading health law scholar at Georgetown; Patricia White, the former (and very successful) Dean at Arizona State; and Kellye Testy, current Dean at Seattle University.
UPDATE: The Boston Globe reports on Kagan's SG candidacy here. The first commenter on the article reports his skepticism of Kagan and Obama based on his own experience at the University of Chicago, which he refers to as "Moscow on the Midway," and says no one talked to him when he declared that he was not a communist. I suspect this fellow thinks the John Birch Society is too moderate as well. In any case, first thing Monday morning, I'm going to find Richard Epstein and Eric Posner in their offices and let them know our reputation.