I don't understand why no one has mentioned upgrading your graphics card... Surely if you got a high-end NVIDIA Quadro FX 4800 or something (192 CUDA cores) this would go faster...
Of course if you could afford a few NVIDIA Qadro Plex 2200 S4s (at 960 CUDA cores each), this calculation would really scream. Perhaps NVIDIA would be willing to loan you a few for a "Technology Demonstration" as a PR stunt?
Surely they'd want to be part of this historic calculation...
