Hi Neil,
In general, Nikon has good backwards compatibility. Digitals will work with almost any AF (Autofocus) lens with varying levels of features supported (matrix metering, 3D active metering ......). The link below is just one of many hits for "Nikon lens compatibility" on Google.
Nikon SLR Camera & Lens Compatibility Chart
Interestingly, there are some lens functionality differences between the D80 and D90, but these relate to film SLR lenses used on DSLR bodies.
Vibration reduction seems to have been incorporated as a feature/function of the lens by Nikon, rather than the apparently more economical body feature as adopted by some others. This will make your lenses a little more expensive, I guess.
Now that I think of it, the D80 doesn't self clean the sensor. This could be a nuisance if you change lenses a lot.
Regards, Dave