“Ron” Tajima’s Wii Balance Board Roomba looks like a fun way to clean the carpet. The idea is that you surf on the Balance Board, leaning forward or back to steer the robot. The video is a little short on details, but he’s using a laptop to read the bluetooth data from the Balance Board and then send control signals to the Roomba bluetooth adapter.
You might recognize Ron from some other Roomba hacks he’s done. A while back, he showed how to control the Roomba with the Wiimote (similar to the balance board hack), but the real gem of his collection is Rommba PacMan: