According to this Michelle Malkin post,  looks like Stevens and Murkowski did support the filibuster to allow for more amendments.   So I take that to mean they didn't plan to vote for the bill as-is, but only an amended bill.  Small comfort, but let's give them some small bit of credit here for at least that much.

However I did get a 3 page form letter from Murkowski describing why she thinks the bill is not an amnesty bill, and why the so-called "triggers" mean enforcement happens before... well, amnesty.  Since the illegals get immediate provisional status even if no future enforcement ever occurs (and probably won't given all the laws congress has failed to fund so far) it's hard to see how that's not immediate and permanent amnesty.  In any case Lisa's letter makes clear she thinks this bill is good thing and I suspect that without significant pressure from Alaskan citizens in the end she will vote for the bill.  There's a reason why Malkin's post lists her as one of 15 expected to get pressure from the White House on this bill.  The entire form letter was a clear attempt to convice the reader the bill is a good one.

I take it she is feeling a bit defensive on this issue... 3 pages is the longest form letter I have ever received from her!

No form letter from Stevens yet, so I don't know his current position, however it must be pretty soggy or he wouldn't also be one of the 15 targeted senators for "conversion" by the White House.

Keep up the pressure on these two!  It's clearly had some effect already.