I follow John's flickr site, he does a lot of cool stuff. His slip ring design (all internal wiring from fork through frame) is very interesting. Since he's posted it on the interwebs, I'll link to it here. I haven't seen any other detailed posts on how to do this, there's a lot of thought and planning that goes into this design.

As [MENTION=111144]Andy_K[/MENTION] pointed out, I built a frame around RTP tires when I took the UBI framebuilding class. John's been doing this a lot longer than I have, and I already see things I would do differently if I were to make another one. He's bending his own chainstays - I came to the conclusion that if I didn't want Rivendell Clem Smith Jr. length chainstays, one needs S-bends to get around the need for fat tires and chainring/crank arm clearance.

Do yourself a favor and go through his flickr album on this bike. It's pretty cool watching him solve the myriad problems that one comes up with when designing a "outside the envelope" bike frame.