The big one being Nen's. Grissom and Perez will also be FA's after this year. I don't know if they'll be able to land Beltran, but I do think they will try to pick up an impact FA next winter.
There wasn't much room to make an impact move this winter with the salary range they are trying to stay at. It's frustrating, because you know they are making money and at worst breaking even, even with the ballpark debt. But, It looks like they are serious about staying in this range so Sabean's going to have to make some smart moves to keep them competitive.