Programming software apps can be fun, but there's something to be said for being able to physically interact with a project with more than just a keyboard and a mouse!

Electronics:

• Hacking the SX2 Mini Mill - Discusses adding a reverse switch and reverse-engineering the tachometer port protocol.
• "Forknife 2" - SRV-1 Based Robot Controlled Remotely via Android G1 Phone. - I built another robot, but this time it is based on the Surveyor Corporation's SRV-1 and is remotely controlled with my G1 phone. Take a look, everything is open source!
• "Forknife" the Android G1 controlled robot - I wanted to control my arduno using my Android G1 phone. A quickly put together robot was the result!