My D300 L Bracket fits the D90 nicely. My D70 and D200 L brackets will not fit my D300 and my D300 bracket will not fit the D70 or D200. Sometimes the changes are VERY small. The problem ares are the access slots on the side and the bottom of the LCD.
The D7000 will require more use of the side access flap since it does not have a 10 pin connector and uses the mini USB on the side instead.