January 18 to January 22 - CRUNCHATHLON GPUGRID [MONTHLY RUN - RACE XXVII]
For the GPU heavies: Crunchers sans frontières have their monthly GPUGrid challenge. Used to be nVidia Double Precision CUDA only, but there's now an OpenCL CPU application too. And they have an AMD GPU application....for Windows only. This might be a chance to hire an Amazon Server plus GPU for a short while to see if it works, as they also cater big GPUs...

CRUNCHATHLON GPUGRID XXVII chat and stats page