My Washington sources who deal with Kay's staff up there tell me that Kay is going to vote against Sotomayor, and she is going to explain her vote in two ways. First guns (link). Excerpt follows...
Second, Kay is going to explain her vote as a continuation of her no vote 10 years ago when Bill Clinton nominated Sotomayor to the lower court. I don't think Kay has any choice but to vote against Sotomayor, even if it costs her a little bit in the Hispanic community.
Guns and a previous no vote are pretty solid ground, even though she has never voted no to any Supreme Court nominee... including Clinton's nominees such as Ruthie Ginsberg... so far in her career. Kay is also on the record in the past saying that ideology should not determine a yes or no vote for the Supreme Court nominee. Reversing herself on that might not make Hispanic voters happy.