Robots That  Rake and Shred Leaves -

The Frontier Robotics Company (http://www.frontierrobotics.com) offers six robots designed to take on various tasks around the home.  The Quadrobo ($500) rakes up leaves with four rotating titantium leaf rake type arms and then shreds and bags those leaves for use as mulch.  The company asserts this clever machine can rake and process three acres of leaves in less than hour.  It sounds like it would be handy even taking 5 hours to do that job.