I was reading an article online that you could use a Raspberry Pi to control some ASIC USB Bitcoin miners. I wanted to see how well it worked and if it could be profitable to run a rig like this.
ASIC USB Miner - I had six but used 4
Powered USB Hub
16GB 10 speed SD card
Minepeon - Can be found here - http://minepeon.com/index.php/Main_Page
It was a very quick and easy thing to throw together and I let it run for a month straight. I am not wealthy from this in fact I am sure the electrical requirements caused me to not even break even. Running 4 miners I was able to hit a stable 2.97 GH/s.
I am thinking about building a solar power system for this and adding some more miners just to see if I can make a profitable miner out of this setup.