The letter is here. Deans of all the major law schools signed, with the exceptions, it appears, of Stanford's Larry Kramer, Chicago's Saul Levmore, and Northwestern's David van Zandt. (Does anyone know why?) Also absent from the list of signatories are the Deans at conservative religious law schools like Pepperdine, Regent and Ave Maria. Shame on them!
UPDATE: Other readers point out that there are no signatures from the Deans at Georgetown (Alex Aleinikoff) and George Mason (Daniel Polsby). Bear in mind, of course, that some of these omissions (both those mentioned in the Update and the original posting) may have been accidental, a result of bad timing, and not a decision by the Deans in question not to support the statement.
ANOTHER UPDATE: A young legal scholar writes: "I don't know about Alenikoff, but Larry Kramer's book is all about curbing the judiciary through funding and impeachment threats - he could hardly sign a letter protesting the same." I had thought it was primarily about mob violence as a tool of constitutional interpretation, but perhaps this is right.