According to this website, Tool are headlining the Coachella Valley Music & Arts Festival in California, apparently playing on the 30th of April. Too bad about the rest of the line-up…..
Looks like those fans who were expecting the Smashing Pumpkins to reform for the festival will be bitterly dissappointed.
Thanks to arium on Toolarmy for the tip.
http://www.billboard.com/bbcom/news/article_display.jsp?vnu_content_id=1001921286
Edit: Fixed link. Hellboy.