08 Corvette C6 to get the LS3 6.3L V8 ~440hp
LS2 is still in production though for the base V8 engine Camaro (GTO return in 09? still rated at 400hp), Grand Prix, Impala (rated at 362hp)
No word on the Z06, but there is a supercharged version in the works to compete against the 08 Viper SRT-10 which has 600hp and an 8.4L V10. But its supposed to be like 6.2 or 6.3L forged with a roots blower.
With the next-gen Cadillac CTS-V getting the 7.0L 505hp LS7