re: Supergreg & Rubberburner
I believe both those sites are part of a ‘viral marketing’ campaign being unleashed by the geniuses who do the ‘Buddy Lee’ Lee Dungarees denim ads. In the TV ads, Buddy Lee (the lovable doll who always wins in the end) competes against both Supergreg and Rubberburner (DJing, the former and go-cart racing, the latter). So I believe ‘Rubberburner’ refers to burning rubber in a go-cart.