If you have a 6 speed manual Camaro SS (with LS3 motors) on order, there is a temporary hold up. GM is having an output shaft failure using the launch control feature. The Tremec 6060 gearbox is not being recalled, but this is a considered to be "in production review" while the issue is investigated further.
This does not affect V6 Camaro LS and LT models at this time.
You may also join the MN6 constraint discussion on 5thgen.org
July 17th update: It appears the issue has been resolved. As MN6 cars pass inspection in Oshawa, they are being released for shipping as of today!