This isn't necessarily restricted to *nix platforms, but I have a significant amount of processing power available on my home network that I feel is being underutilized. Specifically, a web server (Debian) that is probably at a good load (.07, .03, .01) for a web server but could easily handle more web services or provide more requests for database applications (MySQL database is local to the webserver), a FreeNAS box that is horribly underutilized (P4, 512MB RAM machine that does nothing but handle backups at the moment, the only reason I have this machine as a NAS is because it has the tertiary IDE port that allows me to RAID more drives). Lastly, I have a
beast that I was using as a test machine for a while, but it's been sitting in the closet turned off for a month now. I run most of my vm applications on my desktop that has plenty of resources available to do so.
Any ideas on what to do with the extra power? I've never really been interested in donating processor power to the *@HOME projects, but I'm looking for some good uses of these computers that are either interesting or useful.