Steven P , Jul 04, 2010; 11:10 p.m.
The version II 18-55 lens mount is under $20, shipped from Nikon parts dept. and takes about 5 minutes to replace.
I guess I'll find out the cost of the 55-200's mount when I break it. (I don't handle by the lens alone on my D300, as it seems like a problem waiting to happen.)
Nikon is one of the few companies that will sell parts direct to consumers. I've always found them to be quite friendly and knowledgeable.