Now there's an open letter from Phil Lesh, former bassist for the band endorsing the Internet Archive's repository, saying "I was not part of this decision making process...I have enjoyed using Archive.org and found it invaluable during the writing of my book."
A spokesman for the Grateful Dead has attributed the takedown of the recordings to a "communications SNAFU" and promised that they would be reinstated shortly: "It is my understanding that by the end of the day, the audience tapes will be restored to archive.org" Link to article, Link to Lesh letter (Thanks, Breon and Dan!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.