Due at your local video store in November:

Festival Express

This was shot in Canada way back in the 70s, and as far as I know never had a theatrical release (at least, in the States, not outside "major cities"). Some promoter had set up all-day festival concerts across Canada, put the entire roster of performers on a chartered train to hop from one site to the next, and invited the filmmakers along for the ride.

The film consists of on-stage performances as well as (better yet) informal jam sessions recorded on the train. Check out the ad-hoc duos listed as performing some of the numbers: Buddy Guy and Rick Danko, for example, and Jerry Garcia and Sylvia Tyson (!)

Roger Ebert gave this an enthusiasic "thumbs-up" review several weeks ago on TV, long before the DVD would become available. My brother sent me this link a few days ago, and now I can't wait to see (and hear) it -- the disk will, of course, feature state-of-the-art surround sound.

Note that the roster includes some folk-music acts in addition to the rock 'n' roll headliners, e.g., Ian & Sylvia and Tom Rush.