A lot of people seem to be under the impression that you can magically 'create' AA in games that don't natively support AA just by using NVCP. Unfortunately, that's really not the case.
It's very rare nowadays for games to come out that actually support AA (and hence it's possible to set AA in the NVCP) ... but do not have AA options in the in-game settings.
In fact, the only games I've played in the past 4 years that didn't have AA options in the game, but that you could successfully 'force' AA through NVCP were: Bioshock ( at least in DX9), Mass Effect 2, and Singularity ... all DX9, Unreal-based games. There's also been a few I've played where there was only a check-box for AA, but that I could actually get higher AA levels through NVCP, like Titan Quest.
From what I understand, though, AMD's 'morphological AA' is something that's actually along the lines of what many people think 'forced AA through NVCP' is ... i.e. a way to 'universally' achieve an AA effect in games that don't actually 'support' AA.
@OP it sounds like you'll soon be finding out how the SLI scaling is in SC2, eh? I'm guessing w/that much processing power, and running high resolution and IQ settings, the scaling from the 2nd GPU is probably going to be quite good most of the time for you.