Mapbuilder supports Yahoo! Maps AJAX API.
This really neat how easy is to add support of new API provider - Yahoo! Tonight I've added feature which allow MapBuilder users to build map using Yahoo! Maps AJAX API. That feature is available under "Map Implementation" menu .
Right now I see a huge benefit for MapBuilder users - they can change map providers by one click. MapBuilder will do the rest. Here's an example of Yahoo! AJAX map created by MapBuilder:
source code demo, map preview.