Well, I too gave my D70 to my daughter, who is just starting out in photography. I gave her the D70 "kit" lens as well (18-70DX). Of course, she will eventually start using my other lenses as well but the 18-70 is a good start.
My D2X is about to be sold. I haven't used it at all since getting 2 D300's when they came out last fall. I have shot essentially exclusively with the D300s (both with MB-D10's) since I got them.
I was planning to keep my D200 as a backup body, since my wife and I often shoot together, so both D300's are in use and we need to have a backup body in case one D300 fails. However, with the D700 coming in, I may sell the D200 as well.