Now after a few years Pete's book in now out. Below is the info:
Where Have All The Flowers Gone: A Singalong Memoir
2009 Edition
By Pete Seeger
A Sing Out! Publication In Association with W.W. Norton & Company
New York - London

The biggest change in the new addition has been an accompanying CD containing 267 MP3 files. At the touch of a button you can hear, more or less, the beginning of every song. There's also a new "Postscript" with fifteen new songs put together in the last 15 years.
If you're not able to find it in your bookstore...ask them to get it!!

Orders and inquiries should be directed to the publisher:
Sing Out Corporation, P.O. Box 5460, Bethlehem, PA 180015-0460
Phone: 610-865-5366