For those who haven't seen it yet: the latest Rivendell Reader has an extensive interview with Richard Sachs.
I found especially interesting the comments on oversize tubing, frame geometries (he laments the "Americanization" of racing bike design) and frame stiffness.
For those who don't subscribe to the Reader, I can recommend it wholeheartedly. (www.rivendellbicycles.com)
Disclaimer: Grant Peterson is a friend, and he has helped me publicize my Vintage Bicycle Quarterly when it first got started.
Jan Heine, Seattle