The robots are flying fast and furious lately with another robot for today which looks like a roach and can climb vertical surfaces. They show the robot climbing up a treetrunk, climbing up a brick wall, climbing up a wood wall, and climbing up a plastic wall or some such. Apparently this is another DARPA funded project (military) and I can think of all kinds of things you could do with it. For example, it could be used for mounting turrets or antenna on cliffs, climbing cliffs, bugging trees with cameras and speakers, and any number of other things where you need to climb a vertical face. Have the mule robot from yesterday siddle up to the cliff and launch these climbers. Six legged robot roach ninjas for the win!