I have the D90 with the 18-105 VR lens - it's a beauty.
The range is excellent for most things and the quality is nice and crisp.
If you are forking out cash on it, you might like to look at the 18-200. I don't know what the difference is in price, but I do miss the extra length I had with the 200mm. Moon shots for example were great on the 18-200, but I don't think the 18-105 quite cuts it.
I have a D90 and 18-105 for sale by the way if you are looking
second hand. Not the reason I posted, just an after thought.