There's a discount on GreenManGaming.com with a 20% code. I picked the game up earlier today for $36 USD and managed to activate it on Steam, so those of you who want to get in on the game and can't find local stock may want to hop on!
For SLI fix use 0x0C4010F5 for compatibility bit. I'm on 301.42 and it still runs decently at 60 FPS with around ~60% GPU usage in the benchmark. There are others with the same compatibility fix who claim 99% usage in game so YMMV as always.
Have you guys played extensively with the texture packs? I'm not noticing a huge graphical quality difference with the added textures. It's somewhat annoying that the benchmarks are never entirely identical either.