iRobot announced the new generation Scooba floor cleaning robot in May.

iRobot sent out an email that the Scooba will sell for $399.99 from the iRobot store this November.

The iRobot Scooba floor cleaning robot brushes dirt up and then it washes the floor with fresh liquid cleaner. With the liquid it scrubs the floor and then picks up the dirty containing liquid to leave a dry floor. Sounds like the perfect way to clean a floor.
More details on the iRobot site.
iRobot sells all kinds of accessories for their floorvacs, including a scheduler for automatic cleaning.