I really would like the idea of building my own oblivion dungeons, Halo 2 maps, or even Prey levels, but on a console this is pretty much not a viable option, even tho there is one successful game with a level builder on the 360, Far Cry Predator, but how about even sell or offer for free a PC download that we can build game levels for our 360s and upload to a web site and then try it on our 360s.