I ran across the Clockwork Bikes website from some posts Joel made to the framebuilders list, and wow. He does some really amazing and creative work. Definitely thinks through a ton of little things when builkding a frame. Check out the cable routing and brazeon details on his frames. And there are some really great fillet brazing photos on there. And lots of bikes that you don't usually see from a custom builder - urban trials bikes, full suspension, etc. And a couple awesome 29ers.
Also tons of vintage bike posters, photos, etc. I seriously spent a solid couple hours last night visiting every single page.