Penguin in Bondage - The Little Known History of the Mothers of Invention by Frank Zappa

Mothers Day is now May 10. May 10, 1974. Zappa.com just blasted out an iTunes-only release from the Vault.

Order it here. Details from Zappa.com:

Recorded at Auditorium Theater, Chicago, Illinois at the stroke of midnight on the Day of
The Mothers, 10 May 1974
Band:
FZ: Guitar, Vocals
George Duke: Keys, Vocals
Jeff Simmons: Rhythm Guitar, Vocals
Napoleon Murphy Brock: BG Vocals, Sax
Don Preston: Synthesizer
Bruce Fowler: Trombone
Walt Fowler: Trumpet
Tom Fowler: Bass
Ralph Humphrey: Drums
Chester Thompson: Drums
4 Track 1/2" analog tape - Edit Master by Frank Zappa
Mix by Jared Lee Gosselin, UMRK, May 2011
Vaultmeisterment by Joe Travers, UMRK, April 2011
Original tape transfer to WAV through Euphonix converters to Nuendo at 96K 24B via ATR 4-Tk plus edit in gtr solo at reel change & the fade over and out by Vaultmeister.