Well, this is came a little late but I think anticipated. Though not from Microsoft itself, but seems developers on Visual studio are also feeling it. After all the noise regarding the new front ends from all around; AJAX, SilverLight, JAVAFX etc, SWF seems to be on top. Here are two more IDEs for SWF development and that to on Flex Framework and on top of Visual Studio. Amethyst and Tofino.
Amethyst comes in 2 flavors Personal and Professional. Personal Edition is Free as well. According to its makers, SapphireSteel Software, The personal edition will be completely free and may optionally be installed into the free Visual Studio ‘shell’ edition. Amethyst Personal (beta) will be available from Amethyst site in the 2nd week of December 2008. Amethyst Professional will be released in beta in the first quarter of 2009 and the final version is expected to ship in the 2nd quarter.
Happy Flashing :)