>> Do you know if anyone has done CMP (Kershaw) yet?

not on the radar...

>> on VIR can you run just north course?

All 3 configurations. Grand, etc.

>> best/most realistic wheel and game option

Logotech Momo Force and rFactor. There are other wheels but why spend $300?
rfactor is the game that will allow any modification. Any series, any track, any cars etc... GTR2 will be coming out next month but that is for FIA GT cars only.

>> Anyone actually "driven" Road Atlanta??

Forget the map pics posted here they are not related to the game.
The Petit LeMans version of rFactors Road Atlanta track is correct.