Blurb is a service that allows you to create (real, offline) books from blogs and other content, and buy them for yourself or sell them to others. Prices start at $30 for a 40-page hardcover coffee-table book with a custom dust jacket, and go up from there. Look for a press release announcing the service tomorrow (Wednesday).
You need to download their software to create a book - they have both Windows and Mac versions available. I'll be testing this out but am having difficulty downloading the 20 MB Mac client (it could be my pathetic hotel Internet access). This looks very similar to Picaboo, which I wrote about late last year, albeit with more of a blog focus.