I recently heard that Phil Anselmo(Pantera,Down,SJR,Viking Crown, Southern Isolation,Eibon, + others) and Tony Iommi(Iommi & Black Sabbath) are working on a collaboration! Anyone else heard anything about this? Phil sang on Tony's last album, and it was pretty cool! I don't know if this is a guest appearance or a full cd or what! Should be pretty good! I don't know how Phil keeps all his stuff straight!
Meh, lots of artists have tons of projects. Mike Patton is in five full time bands, and has done collaborations with Dillinger Escape Plan and many others.