Belt drives are slowly starting to trickle out into production bikes, replacing chains and improving performance. Of course, for $US3360 I'd hope a bike would kick arse.
The District Carbon is Trek's second bike to feature a belt drive, and it really doesn't skimp on the features. It sports an OCLV Carbon fibre frame, making it light and strong. And that belt drive cuts the weight even more while staying clean and never stretching or breaking. But yeah, $US3360. [Trek]