Thankyou everyone for the kind comments. I'll try to respond to the questions:
tdrown: I'm 6'2", and the cabin has sitting head room, but just barely. There is a lot of sprawling room though - two people could sleep comfortably with about 6'6" of length fore and aft, and the sloping hull sides are nice to lean against. I did not do a lot to finish the inside other than to leave the carlins and rafters bright as it will be used primarily as a day sailer (and I wanted to hurry up and get on the water!). She is quite light for her size and draws less than a foot with the board up, about 3 feet with the board down.
Frank: Siewer's is pretty good to work with - everything was high quality and in stock, and prices were in line with local supply. They didn't take too much of an interest in what I was doing with the wood, but they are usually pretty busy. Anyway, I'd recommend them.
Building the mini-cup was pretty much vital to my success, I think. The Stevenson's provide extremely well detailed building instructions that eased me into the building process, and the mini-cup experience gave me a real idea of what I would be getting into with a larger project. One of the major hurdles with the Chebacco is the lack of detailed written building instructions - earlier builders provided a couple of pages to outline the general process, and there is a fair amount of information on the web, but with out having built something else first I don't know if I would have gotten done - it would certainly been more stressful without previous experience! Adding to the common body of knowledge for Chebacco construction was one of the primary motivations for the web site.
Barry: I've had her out three times so far, but the wind has been light and variable each time so I have not had a chance to see how she handles when things kick up. So far though my expectations have been met - the Chebacco is an unballasted daysailor and seems to perform that task quite well.
Bill