Scott Goldberg of the Digital Media Wire reports that an anonymous reader tipped Bob Lefsetz, author of The Lefsetz Letter, yesterday about an interesting development in the live music world: "ZEPPELIN just confirmed for Bonnaroo. They can't officially announce until after the London gig so pass it on! Also METALLICA is confirmed on the bill too!"Goldberg adds: "Anyone who has experienced the unique event that is Bonnaroo (or its younger sibling Vegoose) knows the four-day Manchester, Tennessee show's trademark is its eclectic mix of bands. Considered 'the largest hippy festival in the world,' as Andrew Stockdale, lead singer of WOLFMOTHER said onstage last June, the festival organizers always manage to add plenty of non-hippy artists. In 2007 there was also the addition of a 'classic' billing, the re-emergence of THE POLICE."