Bike porn

Gates seem to be supplying only to OEMs at the moment
http://www.carbondrivesystems.com/contact.php?lang=us

although there's nothing to stop the enterprising amateur from making their own belt drive with off the shelf toothed belt components available from drive factors and a bit of machine work to interface it all to the bike parts.

The Gates parts are horribly expensive in t'shops, complete drives from about $300
http://www.universalcycles.com/shopping/index.php?category=4081

European source.
http://www.g-boxx.com/e-carbondrive.html