https://github.com/Hylian/Robotics-BoosterPack
Here's a BoosterPack that @szhao, jwp071, and I are working on. It's a BoosterPack that turns a 40-pin Launchpad into a fully functional robot.
It has two Micro Metal Gearmotors from Pololu driven by a DRV8833 motor driver IC and has five QRE1113 reflectance sensors from Fairchild for line tracking. It also has breakouts for a Sharp IR distance sensor and a servo. For power, a 3xAAA battery holder fits between the LP headers, which powers the 3.3V and 5V pins, as well as 9V for the motors.
No pictures yet, as I'm in the middle of routing the board. I'll post updates as they come.
Edit 6/30: A picture of the board in progress: https://dl.dropboxusercontent.com/u/538662/robot-boosterpack.png
You can see the motor mounts at the far end.
Edit 7/1: It's slowly shaping up... https://dl.dropboxusercontent.com/u/538662/robot-boosterpack2.png