Google has introduced the term Mapplets to describe what it's calling the next generation of user-created data overlays commonly known as "mashups." In the LatLong Blog, product manager describes the new platform in Google Maps Mashups 2.0. Mapplets are intended to be mashups that allow developers use dynamic data, such as live weather information, or events from Zvents, as an overlay on a map.
Mapplets are available on Google's MyMaps tab, along with a drag-and-drop editor that allows users to add placemarks to a map, which was released in April.
In addition, users can add existing Mapplets to their MyMaps page from the Google Maps Directory.