Now what was that framemaker's name, anyway?
 

Can't think of the guy's name, so I can't look it up. He makes custom mountain bikes, including a 29er single-speed cruiser-style bike. If I remember right, the seat tube on that bike fits right up against the rear tire and curves around it. Now what's his name?

I'm trying to remember who did curved ST MTBs back in the day. Did Ibis do those?

I found Don McClung in a Curved seattube google search...
http://www.flickr.com/photos/awalker...n/photostream/

There are several builders like that out there, but the first one that comes to mind is Black Cat.

http://www.blackcatbicycles.com/

Aha! Found it! Hunter Cycles:
http://www.huntercycles.com/