Doug's frame is almost done, here are a few more pictures (mostly for Doug, but I figured others might be vaguely interested).
The frame uses a 38mm 9/6/9mm butted downtube, ovalized out to 42x34mm at the BB shell for a little extra stiffness. Seat tube is a 31.8mm straightgauge 4130 tube, and the toptube is 32mm 8/5/8. Pretty beefy all-around - it's a huge frame. But it's still reasonably light at a little under 7 pounds with all the hardware (but no shock).