I have been using a few Raspberry Pis now for controlling gear with mixed results.  For instance MinePeon does well for SHA-256. The Grid Controlla Community Edition for Gridseed.  What have been your experiences?

Hardware wise its always down to the USB ports.  I have great faith in the upcoming KickStarter to solve some of it, https://www.kickstarter.com/projects/10la/raspiado-the-usb-hub-that-fits-your-raspberry-pi?ref=nav_search.  Adds some ports, takes care of power cord falling out, and it mounts on the bottom.  Just have to figure out a case for it all.  Anybody else observe any good Pi add ons?