Not as charmingly named as the Roomba, Looj is iRobot's gutter cleaning robot. Like the robot vacuum cleaner, I think this is another perfect application for technology. I say this as a man with a gutter problem to solve.
The Looj comes with a battery-powered remote (2 x AAA), a 7.2V NiCad battery pack (very robust), with wall charger, and a sweeper / "auger" assembly.
Looj is NOT autonomous. Must be controlled by a human with the remote. As I write this, I am charging the batteries. Performance report to follow.