What about Mark Mulder? Just throwing it out there. Probably will demand too much $, but he'd be an interesting guy.
After Miggy goes off the books next year, what about taking a shot at Noah Lowry? He has a $6.25 million option for the 2010 season. The Giants seem to be both trying to rebuild and contend all at the same time, so perhaps Lowry's option is not picked up.
Sidenote: Does anyone else think the Giants could make some noise in a perpetually average NL West? A rotation of Tim Lincecum, Matt Cain, Jonathan Sanchez, Randy Johnson and Noah Lowry seems as stacked as any in the NL other than Chicago. Oh yea, Barry Zito is in the mix too for what it's worth...
Here's the ZIPS projection for the 2009 Giants. Remember that Edgar Renteria and Randy Johnson have been brought in since the projection was made earlier this offseason.