Sludge / Hardcore metal band Armed for Apocalypse, from Chico, California are opening up for Sepultura and Crowbar this April. Check it out:

A4A came through the Bay in December on tour, but their upcoming tour with Sepultura appears to be a Europe-only deal. You can read an awesome review of their show here. The band is signed to Metal Blade records and has tunes from their album Defeat up on their myspage page.