The Kobo and iBookstore versions should be going live at anytime, but the Kindle and Nook versions are available. If you are thinking of getting a copy for the Kindle, please give some thought to picking it up today so that we can make a little bit of a splash over there on Amazon on release day.
here are the links for Kindle and Nook:
The print version will be 328 pages and will be out next week! I'll post when those links are available. :)