Due to the popularity of the demo galleries for our JavaScript and Flash APIs, we've added a demo gallery to the Mapplets API documentation as well. The demo gallery shows Mapplets created by both Google engineers and 3rd party developers, and provides links so that you can easily view the XML or use the Mapplet in Google Maps. You can learn from the demos how to do things like display KML files, store user preferences, localize your gadget to many languages, render custom tile layers on top of the base map, and more. Many of the demos come straight out of Sterling Udell's fantastic book, "Beginning Google Maps Mashups with Mapplets, KML, and GeoRSS: From Novice to Professional".

Browse through the demo gallery, and post in our new dedicated Mapplets API forum if you have questions (or a demo to contribute!).