I had a D40x, but sadly enough it was stolen. When looking for a new camera I was leaning towards the D60, but I was told it would be better to wait a little, because Nikon was going to bring out new models soon... so I did.
Enter the Nikon D3000, D5000 and D90. At first I was going to choose between the D5000 and D3000, the D5000 was my first choice, but the rotating screen kind of turned me off, because it had only 1/3rd of the pixels the D3000 has... so I really was not sure what to do.
I then happened upon a very good deal for the D90, en I ended up buying it... I have to say, I never regretted that choice. It's a great camera, for beginners and advanced photographers alike. Plus it allows you to grow and develop and expand your skills because this camera can do so much! I would definitely go for the D90 instead of the D80.