The online mapping products get cooler almost every day. The latest buzz is around Microsoft Street Slide, which is not live yet, but is currently being developed.
Here is a video that explains it better than I can in words:
There are more articles on this at Neowin, Google Maps Mania and Search Engine Land.
A Google Blogoscoped Forums thread points out some people are trying to do the same type of things on Google Maps via their API over here.
This is neat stuff.
Forum discussion at Google Blogoscoped Forums.
