National Review Online focuses attention on Webb and Ensign (potential swing "no" votes) and Bayh (a potential flip to "yes").
And here's the list of Senators the bill's proponents seem to be worried about, according to Noam Askew:
Senator Bingaman (D-NM) Senator Bayh (D-IN) Senator Domenici (R-NM) Senator Coleman (R-MN) Senator Brownback (R-KS) Senator Bennett (R-UT) Senator Gregg (R-NH) Senator Bond (R-MO) Senator Murkowski (R-AK) Senator Stevens (R-AK) [E.A.]
Cochran and Hatch and Stabenow are mentioned as potential flips the other way.
P.S.: Emailer B.T. has some phone advice for citizen-lobbyists:
Besides calling the senate office, folks should call the state chair and county chair of the senator's party. ... It would let the senator know that folks know how to do more than get riled up over an issue. Someone who tracks down his county chairman is a lot more likely to be a primary voter ...
There's not much time left, though. ... 2:50 A.M. link
"[I]f an amendment within the pigeon is not defeated," it can screw everything up. Who knew? [E.A.]1:16 A.M.