We put together this little video of me and a mate assembling a MakerBot CupCake CNC 3D Printer. Didn't take us long to throw it together but we had a few problems with the MK4 extruder. MakerBot have now released a MK5 extruder which should be a fair bit better.
Video: [nomedia="http://www.youtube.com/watch?v=rXRvaIBcD-E&feature=player_embedded"]YouTube - Makerbot Cupcake CNC build - 3D-printers.com.au[/nomedia]
See the full write up at: Makerbot CupCake CNC Build Video | 3D Printers Australia