At the risk of just being redundant, I'm another one who first came to the One Bag concept from Doug Dyment's site, but I've always wondered why Tom Bihn isn't one of those he champions a little more. I guess I've always assumed it was b/c the other sites were a paid promotion b/c otherwise I can't figure it out.
Also, I've traveled extensively the last two years with my Aeronaut (and cubes) combined with either the Buzz or Empire Builder, depending on whether or not I needed a more professional appearance. In my opinion, the Aeronaut is pretty much the perfect carry-on bag. I can't imagine traveling without it.