With Imprint™ Link Technology, certain iRobot Roomba® and Braava jet® robots intelligently communicate with each other - working in sequence to vacuum and then mop to deliver an extra level of clean.
iRobot's Robot Mop That's a Cleaning Timesaver Is $150 on Amazon
Wifi Connected Braava jet® m6 Robot Mop
iRobot®: Robot Vacuums and Mops
iRobot's new Roomba is a mop and vacuum in one - The Verge