Once I have the Laser Cutter I'm going to make one of these with a couple of modifications:
enclosed for sound-proofing with VW Bus style open upwards windows.
(yes this will use quite a lot more materials, but it will combine a hamster wheel with a "call pod)
http://www.instructables.com/id/Hamster-Wheel-Standing-Desk
Once I have the Laser Cutter I'm going to make one of these with a couple of modifications: