This was on the front page of the Dom, letcarpool.gw.govt.nz a carpooling site for wellington commuters, mostly seems to be hutt valley to wellington commuters. I interviewed the people behind it and they had about 150 people signed 24 hours after its launch. Anyone tried it?
Demo vid: http://www.youtube.com/watch?v=M-ZVZQ21bB8
Site: www.letscarpool.govt.nz