Well what you see is what you get... It's not done....it doesn't do much of anything just yet.
Things to do:
new motors, gearboxes, or smaller wheels
finalized control code (easier implementation control commands)
new Ni Cd or Li ion battery solution (on board recharging?)
support for both motors to be controlled independently (2nd H-bridge)
steering (remote control)
autonomy (wall detection)
possible switch to gyro/accelerometer combo (pricey)
http://www.sparkfun.com/commerce/product_info.php?products_id=837
school funding? =D