Apparently, Rick Rubin is set to help engineer the new U2 record in September. Rubin is the genius behind Johnny Cash's resurgence with the Amercian Recordings as well as working with a variety of artists such as LL Cool J, Aerosmith/Run D.M.C., Slayer, Red Hot Chili Peppers, Tom Petty, Neil Diamond, Metallica and many others.
Love him or hate him, it should make for an interesting collaboration.