The kit lens is really not bad at all. 90% of the photos we took in Moab this year were with a kit lens. You already have the D80, which is a SWEET camera, so you are pretty much there. Now just save up for this one:
http://www.amazon.com/Nikon-18-200mm...6931084&sr=8-1
Its beauty!
Also, I HIGHLY recommend these 2 books:
http://www.amazon.com/Digital-Photog...6930878&sr=8-1
http://www.amazon.com/Digital-Photog...6930878&sr=8-2
They are cheap and very easy to read and understand. They are loaded with excellent tips and tricks for taking every different kind of shot. The books also tell you about different tools and lenses to use for particular situations. Well worth it if you plan to get more into digital photography.
Bart