If deciding on D7000 over other models D300s / D90, etc... one must ask if good high ISO-performance is REALLY important to oneself. If you do not require high-speed capture (even if coupled with a fast prime / zoom lens) that requires the back-up of superb high ISO capability, then D300s / D90 is good enough. D300s is better than D7000 in a number of aspects - just not the High-ISO performance (since it's sharing the same sensor as D90). The only way to supercede D7000's overall performance, including ISO, is to wait for D300s' replacement - rumoured "D400".
When D400 arrives, I'll have no doubt, most will look towards D400 rather than D7000 - high chance D400 will share the same ISO performance with D7000 for sure.
At the moment, it's a juggle between D7000 and D300s...like I've said - if ISO performance high on the priority list of considerations - D7000 all the way!
don't think the D400 will be there YET.
so for those who already has a camera, cont shooting !
for those who want to buy their first new DSLR, get urs now and start shooting..!