At Adobe MAX 2009 Adobe announced a beta of Adobe® Flash® Professional CS5 including a Packager for iPhone would be made available on Adobe Labs. Adobe has changed plans regarding this beta and no longer releasing a public beta of Flash Professional CS5. This change of plan was made in order to ensure the earliest possible delivery of the final software to the large number of designers and developers interested in Flash Professional CS5 and the included Packager for iPhone.

http://labs.adobe.com/technologies/flashcs5/