Three recent tutorials (including 1 video) about the new functionalities in Flex/Flash Builder 4.5 for deploying to multiple mobile platforms (iOS, Android, Blackberry Tablet) simultaneously:
http://tv.adobe.com/m/#!/watch/adobe-technology-sneaks-2011/sneak-peek-of-mobile-application-development-with-flex-and-flash-builder/
http://www.adobe.com/devnet/flex/articles/mobile-development-flex-flashbuilder.html
http://www.adobe.com/devnet/flash-builder/articles/whatsnew-flashbuilder-45.html
[updated] More related info and links from here: http://bit.ly/bundles/flashplatform/9