I think Joba is a better option than Lincecum because the Giants offense is so miserable and I don't think they have anybody in their farm system to help there or replace their 40 somethings all over the diamond. Joba is built like a horse so he's less of an injury risk, in a WAY better offense, and also has ace stuff. Right now, you can take Lincecum but Joba will be better in the long run if the Yankees don't commit a gross misuse of talent by leaving Joba in the bullpen until he can close.
I have the rights to Joba in my keeper league and I think he should be a safe bet for the rotation in '08 because Broxton was always a reliever in the minors, Rivera only became a reliever because he was a terrible starter, Neshek was forced to become a submarine pitcher so he's better off relieving, and the best closer this season, JJ Putz, was an average prospect and once a 26 year old still in AAA. I just don't see how the Yankees could possibly waste Chamberlain as a setup man when he has dominated the minor leagues as a starter and can take Clemens' spot in the rotation next year.