For more on the Twinity skateboard, see my Koinup blog items: Twinity: Skateboard fun and Skateboarding through Twinity London.
Also fun to do: creating movies in Twinity using the Wegame utility, which is actually quite easy. This is one of the trial runs:
My Twinity Machinima - together with lots of others, often better than mine - can be found on the Twinity Koinup machinima page. Do pay a visit!