There are a couple pieces of software that are starting to take advantage of GPU compute. Adobe Premiere CS4 offers GPU-acceleration on both
NVIDIA and
AMD. NVIDIA's solution only accelerates CS4 on Quadro cards, while ATI's implementation does it on all Radeon HD 2000+ GPUs.
I do know that AMD also works closely with Autodesk, with the latter certifying AMD's FirePro adapters which allows the customer direct contact with an Autodesk software engineer for support. That's not GPU compute, however. I'll see if I can get Bobby, our DCC guy, in here to talk a little more about what 3D DCC firms are doing.