We gave a talk on carticipation at the Silicon Valley iPhone Developers' Meetup last week and posted the video on youtube here (recommend to watch in "high quality":

http://www.youtube.com/watch?v=kaphdB6Wafs

Carticipate is the first and only rideshare application on a location aware mobile platform and has been out of beta since October, but has been out in public alpha/beta since August.

Its a free app, so if you have an iPhone you can check it out.

Steffen Frost 650-520-9181 cell 415-912-1221 dir skype: steffen.frost http://www.carticipate.com an experiment in social transportation