Just got an e-mail from the Vault which included the following:
Playing as part of an all-star jam that included Thelonious Monk, Zoot Sims, and Gerry Mulligan, the Miles Davis show at the 1955 Newport Jazz Festival warrants the importance history has attached to it -- listen to and download the set today! And once you've gotten your fill of his 1955 comeback, fast forward to 1970 and catch some video of Miles playing at Tanglewood.