Wolfgang's Vault seems to have access to a lot of jazz concerts not just those from The Newport Jazz Festival. As with their rock concerts, a lot of them aren't very good but some are gems. There's a couple of Mingus Quintet concerts from '77 (one of which they describe as being by a quartet) that I like better than the studio sessions from the period. And there's a set each by Al Cohen and Zoot Sims using the same rhythm section (with Jimmy Rowles) one night at The Great American Music Hall.
And today they're honoring Dizzy Gillespie.