Don't know when they were announced, but here they are, and a little more (not much, yet) on the site:
http://www.naias.com/
January 13-15
Press Preview
January 16-17
Industry Preview
January 18
Charity Preview
January 19-27
Public Show
Why do I care? Besides all of the other "cool" cars. I'm hoping, and wishing, and praying to see the ZR1, the new Gen V engine, and the production-model Camaro (or something 5th gen Camaro-related)
I also wanted to share that this is 2007 was the second time in a row that Chevrolet has taken the concept car of the year award.
2006 : Camaro concept
2007 : Volt Concept