That site is only half heartedly updated - note that Matchbox 20 is still shown as the 'current' release and there's still no mention of the Duran Duran chip that hit the street 7/18.

Mark, there's no foolproof method for finding out about Hard Rock Casino releases. The best advice is to make friends with as many people who collect Hard Rock Casino chips as possible. Someone usually finds out. Sometimes word only gets out a few days in advance. Rumor is there will be Ringo Starr chips August 30 - but don't bet the ranch on it.