The other day I received the new Apostrophy/Overnight Sensation DVD disk put out by Dweezel Zappa (released ~May 5).
The disk includes the two albums, lots of bonus tracks (like Zappa doing "The Slime" on SNL that I remember seeing at the time) and Zappa working in the studio mixing on JBL 4311s.
I've only gotten through the first 10 minutes (wife can't miss Dancing With the Stars) but looks good so far.