I've been trying to learn a bit about using Google Maps for your own purposes. Since it's helpful to have a project to try out new tricks, I went ahead and made a sort of travelogue of our Road Trip.
It's mainly a lab I've used to experiment with Google Maps and layering data onto them. It's not the fanciest implementation I've seen, by any means, but it's been fun to work on.
If you haven't spent any time with Google Maps, yet, then you should definitely play around a bit. Drag, zoom, look at Satellite and Hybrid.
(FYI - Most browsers are supported, but Opera and IE 5.0 are not.)