Fans tinker with latest electronic gadgets -

washingtonpost.com Highlights - MSNBC.com: "Fans of the TiVo digital video recorder have discovered how to break it open and install a larger hard drive. Early users of the Roomba, a robot vacuum cleaner, are rewiring it to serve as a 'mobile security robot.' Owners of the new Sony PlayStation Portable have figured out how to use the game machine to surf the Internet and exchange instant messages."