Since about a week after it's introduction, I've been shooting with the D90 as my primary camera, and it's been a great run. The D90 is almost the perfect photo-making machine for me. I was thinking of either upgrading to a D300s, or possibly a D700 (all my lenses would work with either FX or DX), but then came the D7000.
I was instantly thrilled with the specs, especially since the D7000 body is almost exactly the same dimensions as the D90 (meaning I wouldn't need to get used to a bunch of new button placements). So, after a little consultation with my bride, I bought the D7000 (it was in stock, momentarily, from Amazon.com).