I got my first bit of feedback about Book today. It was from Zarf, just sending a ping that he had the MS and was a third of the way through it, but still: it's really happening. Good gravy.
To help get me into the spirit, Queue (who is an editor iRL) mailed me a copyedit of my favorite-games page. I told my mom on the phone today that I expect the book revision process to be like that... five hundred times.