I recently picked up a Hackberry A10 for this exact purpose and it should arrive this week. If you are interested, I'll let you know how it works.
I'm interested in any low power solution, so yes, please do.
Also if anyone is interested in selling a preconfigured solution, please post in this thread. I'm afraid I don't have the time to invest in researching/setting up a solution myself and would pay for the convenience. For reference, the best alternative I've found (that would not take significant time for me to setup, and runs under 20W) is a micro-itx PC on ebay for around $120. If you can beat that, it would be a very attractive option.
The Hackberry A10 showed up this afternoon and is working well. I found an old 4GB SD card for the Ubuntu install, setup wifi, and compiled cgminer. Only problem I had was cgminer didn't see my BFL Single as the ftdi_sio module was missing. Once I compiled and added the module everything is working perfectly. Hooked the A10 up to my meter and it's measuring ~3W while mining with 1 BFL Single and top is showing between 1% and 4% CPU usage.
Now I just need to come up with a case.