@Seihyouken:
Sony Cambridge are known for the MediEvil series. They haven't created any new IPs for the ps3 as of yet, but they are kind've like Sony's "fix it" guys at the moment. They help out other teams, even third parties, in getting a good grasp of the ps3's architecture. Word is they also have a game now in production.
Also, we don't know the size of the teams you're referencing, nor if they are costing Sony a great deal of money. BigBig Studios has only worked on the Pursuit Force series for the PSP, and it's unlikely that they are very large. It's also probable that they are working on another PSP title, or possibly even a ps3 title.







