Clemens looks like he still has some in the tank although if that transfers to the AL is yet to be determined. I think it'd be smart to get him for what he has shown in the past (especially in Houston) but you're right, I wouldn't overspend on him, especially if it'll only be for half a season!
Clemens may have some left in the tank, but I wouldn't pay for him unless our rotation, which would contain Wang, Mussina and Matsuzaka, was totally depleted. Maybe if Pavano can come back and pitch decent and Johnson recovers from his back surgery, we'll be alright. Otherwise, I'd still move Sheffield and A-Rod for two more marquee pitchers.
