So, what do we call this? VacBotMod? Not sure, but check out this terrific site with pics and step-by-step documentation: two 'bot-deconstructivists' reverse engineer the Roomba vacuum robot:
"Our first attempt yielded vaulable information about the internals of the Roomba. It is evident that iRobot's engineers have gone through a great deal of effort to minimize the cost in order to make the Roomba affordable. We shall have 802.11b controlled robots roving around any day now."