This is probably the best validation of Flash as a serious alternative to AJAX to date. Yahoo! Maps Beta has debuted and it is in Flash. There is also an AJAX version for the .0001% of people who don’t have Flash installed.
But wait, it gets even better. If you’re a Flex freak (and we know you’re out there), there’s an API just for you. Very, very cool. Across the board, Yahoo! went ballistic, delivering five API’s in total. Three Flash variations, the old simple API and AJAX. You can mix it up any way you like. A lot of people already have.