I basically love all things DIY. In my book it doesn't have to look pretty, it just needs to work and be ingenious.

Check out this DIY cat feeder, where Lee Holmes made an automatic cat feeder by controlling a CD-ROM tray on a PC running Ubuntu Linux, which is hooked into his home wireless network. Being attached to the network allows him to run a script on his PDA phone to activate the feeder on demand. It's great how he didn't alter the PC. Check out the youtube video from his site.

Via Make