These two were created using zCorp machines which apply glue ink and powder in fine layers slowly creating a replica of one of your characters. FigurePrints allows you to create characters from Warcraft, Rockband and Spore printing services are coming soon. A number of other sites allow you to pull data from Second Life and your own 3D programs.
We've been about the popularity of music on youtube - I found this interesting - nice bit of software that lets you use youtube videos as music turntables, mix, crossfade, etc