The Storm botnet is no more (?). It's possible that the original Warezov was merely a Beta version that was withdrawn for improvement and Storm left as a development model. Now that Storm has served its purpose we have the upgraded and more efficient Warezov2.
Didn't you just know it was coming as soon as the 'security experts' started crowing about removing so much stuff from the net? Haven't they seen the movies where the baddies regenerate as the lawmen boast about it all being over now?
No, we're not a bunch of cynical bastards out here in the real world, just more hooked in to reality.