I'm with you all the way.
I bought and returned the D7000 due to unmanageable issues and decided to hold off for a while.
It turns out I'm glad it did.
This focus thing might not be a bug in the camera, but it does seem to be widespread and troublesome, and worse of all, 'inconsistent'. It's clearly 'something', but something that doesn't seem repeatable for everyone every time.
Fixing with the 'fine tune' adjustment doesn't seem like a comfortable solution. I might be 'old school', but the camera has a focal plane position mark (the o with the line through it - on the top of the body) that specifies the distance from the flange to the sensor. I have zero nostalgia for the dark room, but 'lens-ology' tells me that this should be enough for lens makers to figure out what works for focus.
I suspect the complexity of the range of contrast is the culprit, but still, that should be a bug best worked out prior to shipping product. I think there's a 13-lens limit, and I would be one of the folks that would either not be able to use all their lenses or have to put some up for sale (of course, I really don't use _all of them_ now.) ;-)
I have a great sympathy for all the contrast situations and all the lenses that are put on the cameras, but this situation isn't confidence building in the least.
Johnnyapple has, in my eyes anyway, a sort of 'honorary moderator' status. Like frequent flyer miles - he gets bumped up to first class.