Via Right Wing News, five "Republican" congress-critters who've volunteered to be replaced in the 2010 primaries.
* Rep. Mark Kirk [R-IL]10th District.
* Rep. Ileana Ros-Lehtinen [R-FL]18th District.
* Rep. Michael Ferguson [R-NJ]7th District.
* Rep. Christopher Shays [R-CT]Sing it!
* Rep. Michael Castle [R-DE]
Unfortunately, Shays has been replaced by an actual Democrat, Jim Himes. Hopefully in 2010 we can replace him with an actual Republican instead of a RINO like Shays.