According to a post on Eddie Trunk's web site:
Centered around tracks recorded during a pivotal and turbulent four-month period in 1969, "Valleys of Neptune" unveils the original Jimi Hendrix Experience's final studio recordings, as the group lays down the foundation for its follow-up to "Electric Ladyland," alongside the guitar superhero's first sessions with bassist Billy Cox, an old army buddy he'd recruited into his new ensemble.
More info and track listing is here.
I am just starting to check this out. What do you all think? Does it live up to the hype?