All of those Republican seats should be safe, in the absence of retirements. However, we could easily lose Maine if Snowe retires or if Chafee switches in RI.
Byrd, Robert WV (might die or retire); Cantwell, Maria WA (first termer, could be vulnerable); Clinton, Hillary NY(very vulnerable, probably won't run to prepare for Prez '08 campaign); Conrad, Kent ND (another Dem in a Red state); Dayton, Mark MN (bizzare behavior may make him vulnerable); Kohl, Herb WI(Tommy Thompson might give him a run for the money); Nelson, Ben NE(Dem in a Red state); Nelson, Bill FL(against a popular governor, wouldn't stand a chance); Stabenow, Debbie MI (first termer vulnerable)