Currently it's not an album, per say, but it is a collection of songs in its entirety.
Gratefuldead.com has been doing this thing in the month of November called "30 Days of Dead" in which they release a soundboard recording of a song from a concert that hasn't been released yet. It's then up to the community to guess the date and venue it was played on, and the first person to get it right gets a free album (from a particular series called Road Trips) of their choice.
So far I've only gotten one of the songs correct; The "Mason's Children" they released was played on January 10th, 1970 at Golden Hall, San Diego. I wasn't the first one to submit the correct answer though...