Yahoo! Maps for ActionScript 3.0

Getting Started: Yahoo! Maps for ActionScript 3.0
Yahoo! Maps 推出給 ActionScript 3.0 用的 API (首先，記得先去取得一個 id 吧)

The new Yahoo! Maps API is now entirely built in ActionScript 3.0. The Maps API now gives you an incredibly powerful map engine and the ability to create custom components, overlays and markers while consuming different webservices provided by Yahoo!, or your own. The YahooMap component is distributed as a SWC, to get started you need to include it into your build path using Flex Builder.
The Maps API contains a core set of widgets, markers, overlays and web services to enable you to interact with the map in every way.
http://developer.yahoo.com/flash/maps/index.html