Tracklist, via Nick: http://www.jambase.com/article/donna-jean-godchaux-find-leads-garcialive-volume-seven
Sneak preview of one track via David Browne: http://www.rollingstone.com/music/premieres/hear-jerry-garcia-bands-jubliant-live-mighty-high-from-1976-w431440.
At dead.net. a commenter says
In today's Relix magazine they interview Donna Jean who found some more tapes in a box in one of the Godchaux houses. It's a Betty board. This is November 8th 1976 at Sophie's in Palo Alto. Band was Jerry, Keith & Donna, John Kahn and Ron Tutt. Comes out August 19th. Not seeing it on www.jerrygarcia.com or amazon as advertised. Songs include 'Ride Mighty High' and 'Mission In The Rain'http://www.dead.net/store/1970s/daves-picks-volume-19#comment-851376
Very cool - looking forward to it.