The new lineup is coming out March 1st. i don't know whether these cars will be add-on bodies or seperate cars, but they WILL come out. some are already out, like the silver supra add-on
Shelby mustang (green)
shelby mustang (red)
Toyota supra (silver)
Toyota Celica (not sure what color)
Subaru WRX sti (blue)
Pontiac Firebird (Black)

it's really sad that Radioshack doesn't update their site more often, so we have to rely on other, more up-to-date sites like these.