Google Mapplets - Preview
Google are rolling out Google Maps API Mapplets
Google Mapplets are mini-applications that you can embed within the Google Maps site
Here is a first example of a Mapplet in action. Notice the new tab next to 'My Maps'
When a Mapplet is enabled by the user, Google's servers will fetch the Mapplet source code from your web server, and then serve it to the user from gmodules.com. To reduce the load on your server, gmodules.com will cache your source code for several hours."
Full Documentation on this is available here:
See some Mapplet Gadgets
This looks very promising in delivering your on live content on a google based map.
With the addition of buffering and geographical analysis of multiple types of data this becomes more of a geographical information system than a plain old map.
Describing content in visual form empowers people to understand their surroundings.