Adventure Cycling puts on GREAT tours. I've done two - the "old" version of Cycle Washington, which they don't do anymore, and Cycle Montana. The trips are small enough to be personal (I think we had 90 on Cycle Washington) and by the end of the 2nd day, the entire staff knows everyone's name.
The food is excellent (and they accommodate vegetarians, etc.), the routes are well laid out, and the staff is so friendly. I wouldn't hesitate to recommend them to anyone.
Jeff & I are planning to do an ACA trip in 2007. Just can't decide which one!
Susan