Yes, Sarah Palin presents a target-rich environment. Tying other Republican candiates to Palinism is a useful political tactic. But attacking Palin herself is worse than a waste of time. Establishment Republicans have figured out that they need to keep her off the ticket in 2012. Why help them?
If you have time to spend digging up and spreading dirt about Republicans, concentrate on Romney, Huckabee, Barbour, and Pataki: especially the last two, who as yet have almost no national profile.
Update Per a commenter, I’m happy to add Mitch Daniels and Chris Christie to the target list. The work on Christie has a had start in the story of Alissa Ploshnick, the heroic schoolteacher Christie helped James O’Keefe victimize.