Recently purchased this "like new in box" G4 20" with all the original gear. Now running Leopard with the Mountain Leopard Theme & TenFourFox.
Currently at 1.25 GB RAM, picked up a 1 GB stick off eBay yesterday and will upgrade to 2 GB total in the next couple weeks. (that should be fun)
Quite impressed with the speed and capabilities of this 10 year old rig. Nice piece of work..