Google Maps in Flex

There is an entry on the Australian bush fires on the Google LatLong blog, which links to a map of the fires.

Looks like Google Maps, but right-click on it, and you see the usual Flash menu. This particular Google Maps page is built using Adobe Flex.

How can I tell it’s built with Flex? View Source on the page, and you’ll see:

Smart developers always View Source.

This application was built using Adobe Flex, an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR.

Learn more about Flex at http://flex.org

Cool.