Has anyone tried the Rasberry Pi route yet?

There must be cheaper options than the Beaglebone Black Rev. C from Adafruit.com

It seems like major hardware overkill for the job..

Thanks for all the info

Anyone make any further progress on this subject with Overclocked Units (200GH/s)?

Find a reliable 1000W PSU with 4- 6pin PCI-E ports?