AMD plans an absolute GPGPU monster
 

Professional GFX card derived from the R600 core, not for everyone:

"ATI is preparing something really, really special. If it manages to pull it off, it will be a breakthrough even Captain Hook couldn't have dreamt of. We are talking about a GPGPU product, the FireStream/Stream Processor board with no less than four (4) Gigabytes of local video memory.

http://www.theinquirer.net/default.aspx?article=37529