As a long time gamer, which naturally led to building my own systems and overclocking for a number of years, I have been a long time fan of Corsair. There are many of us hardware enthusiasts that looked (and still do) to Corsair first for our memory needs.
As always with Corsair, it's nice to see that you guys do it right once you decide to do a thing.
Having said that, as you can see from the posts above, this is going to be a hard sell for Corsair. As one that has gladly paid $300+ for RAM when there was perfectly good stuff available for under $100, that's not the type of expenditure I can recommend to the average computer user.
While the CS3 and compression tests are fairly impressive - you're going to have to show tests vs the other available CAS 4 modules. While I would recommend Corsair over g-skill, and wouldn't even mind paying a premium, don't know that I could recommend $160 vs $90.
Even amongst the hardware enthusiasts that have only recently 'discovered' OS X, it doesn't seem to take long for a no tweak, it works, leave it alone attitude to develop. Just as an example, I have a P4 3.4 o/c'd to 3.9 that blows away my MBP 2.33 C2D when it comes to encoding video. But do I use it? Extremely rare...
While I am glad Apple must be selling enough computers for Corsair to take the R&D time for this, I can't see a 60-80% premium being a big seller amongst the Apple population. There just does not exist the same type of hardware enthusiast population here as there is in the Win domain.