Everyone has been blogging about Flex 2 Beta 1 being released, but Adobe has also released the new alpha for Flash Player 8.5 as a separate download. Alpha 3 is available for Windows (ActiveX and plugin) and Mac OSX. The uninstallers are also on the same page.

http://www.macromedia.com/go/labs_flex2_downloads

Of course, if you need to test a lot of Flash player versions, don’t bother with uninstalling and reinstalling, just grab Flash Plugin Switcher.

http://www.kewbee.de/FlashPluginSwitcher/index.php