Being locked into a system makes the 'mine's better than yours' argument an intellectual exercise at best. I have no doubt that in real world use they are both excellent bits of kit.
The video on the D7000 is undoubtedly much better implemented than on the K5. But I would never use it. A mate of mine who uses a Canon 7D said to me the other day that he wishes they would make one without it for a few hundred pounds less - for a landscape photographer like him it's just redundant.
Aside from the inbuilt IS and the lack of 'idiot' modes, there are a couple of other Pentax features I find useful on the K20D that have found there way onto the K5 - multiple exposure and 5 shot auto bracketing.
If I was loaded with Nikon kit this certainly wouldn't sway me to change brands.
And the more precise focusing point you're looking for is called 'spot'. I'll get my coat
Geoff - I would say that the K5 is a big leap up from the K10D - the K20D certainly was for me. Although I still use the K10D almost daily , so one has to ask oneself is this constant chasing of the latest shiny thing a fruitful exercise?
Later - clicked the BNC link - Pentax' highest placed camera #6, Panasonic's #7, first 'expert' DSLR much lower down the list- sell fewer at higher margins seems to be the name of the game.