There's a new 100 track collection of old Bob Dylan recordings that's just been released, but it's only officially available to European fans. It's called The 50th Anniversary Collection: The Copyright Extension Collection, Vol. 1, and it exists becasue Columbia and Sony need to release the music commercially in some form to keep the songs from going into the public domain 50 years after they were recorded.
Only 100 box sets have been manufactured, and it's for sale online only through the French and German versions of BobDylan.com, though that undoubtedly will not stop the music from being disseminated via the magic of the Internet. Read more about it here and here and read David Patrick Stearns' take on the copyright question from the angle of the Beatles' "Love Me Do" in today's Philadelphia Inquirer and here.