Now that I have it and have a whole 6 hours with it, why is ANYONE complaining?
The two things that seem to be the most contentious 1) AF system; 2) "black dots."
AF for me, no issue. The AF seems to be better than my 40D, which to be honest I felt is a bit flaky, and while not rip-roaring fast it is not exactly slow either. Sure, I would love 50 some-odd points, but I am not sure I would get any better photos...and it is just nailing the focus (the 40D anti-alias filter to me is WAY too strong, I never felt anything was sharp on that camera - and yes, I did test it).
Black dots? People must be just pushing things to the extreme to prove that the black dots do appear...I can find nothing, and I keep pointing my camera at the Christmas tree - what issue there is, is very small. No worries, buy the camera.
Other stuff: I think it is built as well as the much vaunted D700. Personally, I think the Nikon stuff is over-rated here. First, the joystick on the D700 is junk. Second, beyond that black flecked finish of the Nikon - which Canon never uses except on some L lenses and the G series (?) - looks nice, the finish is much nicer on the 5DMkII then on the xxD series or the last 5D - it doesn't scream at you but when you take a close look, it is beautifully done. Weather-sealing is much better (where you can see it). The plastic pieces are of a nicer quality (it seems). Sure, Nikon's have a few nice ergonomic touches, but they aren't enough to get me to switch and re-learn everything.
Okay, importantly, pictures: They are incredible. So, it has slightly less usable 25.6k ISO. SO WHAT? It also has 9+more MP - what do you expect? Think about this: slightly inferior 25.6k ISO to a 12MP camera. So it shoots one less frame per second than the Sony (in 12-bit, not 14-bit), and the D700 (without the grip). Big whoop. Also, Nikon doesn't have any modern primes, and the full-frame zooms that are up to date are mostly sharp only in the center, because Nikon only recently made the jump from designing for DX. Sure, they've got a few new nice lenses. Canon has had many more up to date designs for years - we have a lot to be thankful for here. Did I mention Nikon doesn't have any pro f4s and is generally more expensive. Want to know why the D700 has more AF points and 25.6k ISO? Re-read this paragraph. They are still a bit behind in other areas...
Oh, did I mention the video? It's excellent.
So smile everyone who is bemoaning the AF system - this is a very competitive camera at a very competitive price. And forget about the dots, they are on the case, and you might only see the problem every few hundred (thousand?) shots anyway. And forget about the other guys, they are just making Canon work harder, and they are starting to push in the right direction after being lazy for a bit.