Russ Feingold, Chris Dodd, John Kerry, Bernie Sanders, and Patrick Leahy are saying they'll vote against the complete capitulation to Bush being billed as a "compromise" and even a "victory". John Edwards is one of two Democrats running for president that's also repudiated the bill, Dodd being the other.
The others are too afraid that Bush will criticize them. Maybe if they surrender totally, Bush will love them.
[Edit] Possibly add Patrick Murphy to the list.