Another cool tool: Yahoo Pipes
Mash it up! If you are into Web 2.0 and going crazy with mashups of Google Maps with whatever else you want, check out this InfoWorld article on the Yahoo Pipes service. Then checkout Pipes itself, and maybe join video service Jumpcut while you are at it.
Pipes allows you to mash together numerous types of data and feed it out a pipe, such as via RSS. You then pick it up in an RSS reader or pour it onto a page. It's a cool example of a web service in action.