Based on the 'Reverse Geocache'.
Hack the Rhinocerous Beetle robot toy
General hacking of the toy - make it remote controlled, add sensors, etc.
Part of the bigger project more or less everybody is working on.
Motion Sensing Camera
To keep track of what my dog and cat do during the day.
Bloomington Crime Stats
I've scraped a bunch (12,000+) of local crime reports and geocoded them. Now need to open that up to Bloomington/the world.
FM (or AM) radio
Get a radio station up and running which will broadcast lots of text-to-speech goofiness, but preferably some useful info too.
Audio with Arduino
Get the Arduino to make all manner of freaky noises. May end up as a workshop at some point.