I'm in their club for lack of saying the silly appellation, and there's HEAVY hints as to a future tour, with Blair (their webmaster/newsletter bullsh*tter and one of Danny Carey's best friends) dropping anagrams in topic headings...pictures of Isis' band members dropping by the recording sessions and hanging out with them (see or look up Adam Jones' blog/myspace I don't know it off hand)...there's lots of pointers in the direction...
Take it with a grain of salt though...I saw them with Meshuggah and thought nothing of Meshuggah at the time; similarly thought they sucked. But Meshuggah are definitely not a bad band...just an Arena tour setting? Nuh-uh.