This came out late last year...
http://www.camaro5.com/forums/showthread.php?t=1533
Gen V small blocks should all be equipped with DI, VVT, AFM, and E85 capability among other things. There was rumor that a version of it would be OHC or DOHC as well.
The GMC Denali concept sported a concept 4.9L GenV engine. It was all name, I'm sure, as I doubt they'd put a one-of-a-kind engine in a non-driving concept vehicle.
According to the agreement between GM and the UAW (about a year ago) the GenV engines were slated to begin production in 2011, however, recently GM said they were delaying V8 engine development in order to save and reallocate money...so I'm not sure where it stands right now -- but I know its not dead.