I know Logos has had a couple of digital-only releases, but this is different. Apparently (from the copy) it will be printed and be available digitally. You sign up to get the volumes as they are completed. Looks like 4 are to be released in 2011.
So for $700 and a long wait you can get a new set of so-far not published and unreviewed volumes. Very interesting.
http://www.logos.com/products/prepub/details/7565