Miscellaneous things. In historical order:
Ubuntu running in a chroot jail on the Motorola Xoom... it was the first dual core Android device out there, and I wanted to try to use the Tegra 2 to its full potential within Ubuntu. Eventually played around with trying to get iOS and some other OSes working, but did not document it that well.
Epson Moverio BT-100 ARDrone. Transparent glasses running Android 2.2 (Horrible device to work with as a developer, but fun thing to do as a hack). Wrote an Android application to run on the handset unit in order to control the ARDrone using a single finger touchpad, plus a D-pad... all while sending video from one or both of the cameras on the drone.