Yahoo! Maps Web Services
JavaScript-Flash® API Getting Started Guide: "The Yahoo! Maps JS-Flash API lets developers add embedded Yahoo! Maps to their web sites. In the JavaScript version, maps are generated by Yahoo! servers and placed into a generic Flash SWF (ShockWave® Format) container that developers can manipulate using the JavaScript programming language."
Flex API Getting Started Guide: "Macromedia Flex is an application server and framework that addresses the requirements of enterprise programmers who want to develop rich Internet applications. Developers can use Flex to create data-driven applications that harness the power of both XML and Flash. The Yahoo! Maps Flex API is a component that lets developers add customizable Yahoo! Maps to their Flex applications."
.. again a cool idea of Yahoo .. I definitely like their JavaScript to Flash approach! ..