Douglas Greenberg , Dec 23, 2007; 10:13 p.m.
You won't know the extent of the damage until you send it to Nikon or a Nikon-authorized repair facility. This is a lens that you can replace for $330 or so. If it can be fixed for less than the cost of a new lens, you may as well have it fixed.
You have my sympathy, certainly. My own 18-200mm. VR zoom fell forty inches off a dresser onto a carpeted floor not long ago. The carpeting helped cushion the impact, certainly. The repair was only $93 plus shipping, and the lens came back actually "better than new" (they made some adjustments to the zoom mechanism).
It sounds like the damage to your lens is more extensive than what mine suffered, but again, only taking it or sending it in for repair will provide you the information you need to make a decision about what to do here.