Since you are interested in River: The Joni Letters, here is a list of other items that you may find interesting.
Both Sides Now
[ Reprise Records / CD - released 8/Mar/2000 ]
The legendary, highly talented singer / songwriter / artist, Joni Mitchell presents a torch song cover album, plus remakes of her own "Both Sides Now" along with the title track and "A Case of You", from 1971's 'Blue'.
Keith Jarrett / Gary Peacock / Jack DeJohnette
My Foolish Heart: Live at Montreux
[ ECM Records / 2 CD - released 1/Apr/2009 ]
This captivating 2CD set documents the music made by the Keith Jarrett Trio at Montreux's Stravinsky Auditorium in July 2001. It is an unusually encyclopedic performance...
[ XL Recordings / CD - released 31/Dec/2007 ]
Radiohead had previously only made this music available via download from their website. Thankfully, they've now released 'In Rainbows' on CD! Pretty much universally loved by everyone here at Marbecks Records, this one comes highly recommended indeed.
Soundtrack / Various
Leonard Cohen: I'm Your Man
[ Verve Records CD / CD - released 22/Aug/2006 ]
Lian Lunson's film celebrates the legacy of one of music's most celebrated and influential troubadours. This soundtrack features powerful performances of Cohen masterpieces by top singer / songwriters - including Martha & Rufus Wainwright, Teddy...
[ Blue Note Records / CD - released 15/Nov/2010 ]
Featuring... duets with such legends as Ray Charles, Willie Nelson, and Dolly Parton, and with 21st Century icons from OutKast to the Foo Fighters.