The rumormill is a funny thing, and sometimes it can run amok. This appears to be one of those times. The DigitalCorvettes.com forum posted a note earlier this evening saying that Corvette ZR1 production has been halted (Bowling Green is shut down this week, so no Vettes are being built at the moment) and suggesting that the ZR1 may be cancelled. A post on dealer Rick "Corvette" Conti's blog, linked in the referenced DigitalCorvettes thread, added to the intrigue.
Autoblog has contacted GM's Terry Rhadigan, who handles global communications for the Chevrolet brand. We presented the DigitalCorvettes link and asked for an official response. His was very clear: