If you consider August 1, 2011 as the official start of the 2011-12 season (USBC uses this date for sanctioning) then they have released 4; maxxx curve, pearl panther, droid, and crystal diamond. This ball will be the 5th release. The Chainsaw SOS came out in July and Buzzbomb Carnage in June, so they're considered 2010-11 releases.
I am super excited about this ball. Can't wait to drill it up this week.