Top Ten list of user created bots so far, not sorted by awesomeness.
"Dragon Subjet" by Wardog
"Transport Drone" by Wardog
"Military Airship" by Vowels
"The Greedy Cleaner" by Trook
"Spider" by Wardog
"Anti-Aircraft Gun" by Vowels
"Cyborg" by ThunderPants
"Wobble Box" by Trook
"Plane Prototype" ThunderPants
"The Hammerhead" by Woodledude