I preordered mine, until then, I am playing the MWSF preview from RtCW. It's actually the full game and even works in MP (with the Key of my Windows version).
Damn am I disappointed! DAMN! I mean, ok, MP is great, but Single Player? I shouldn't have played MoH:AA before. Without MoH:AA, I would have been impressed by the SP missions of Wolfenstein, but after MoH:AA, Wolfenstein's SP seems like a PC compared to a Mac. It runs OK, but you always know "this is better on a Mac (in MoH:AA)".
Sure, you can't really compare them, since MoH:AA is more realistic while RtCW is a shooter, but still MoH:AA beats Wolfenstein by far when it comes to atmosphere, not to mention graphics.
Just my personal opinion.
Wolfenstein MP is still great.
Now back to Alien vs. Predator 2 (hopefully they get the Mac version finished soon, I hate it to play a game on my PC...except MoH:AA)
OK, you die hard RtCW-fans out there, flame me, I'm a MoH:AA fan