As you have probably heard, Apple has updated the terms of their developer program license. In particular, section 3.3.1 has been revised and now allows developers to develop applications with a wider array of tools and technologies, including Flash CS5.
We have posted some more information on this on the Adobe Conversations blog. Speaking about the packager for iphone included in Flash CS5:
The feature is available for developers to use today in Flash Professional CS5, and we will now resume development work on this feature for future releases.
Christian Cantrell has posted a refresher on getting started with the packager for iphone, and I will be updating my FOTB session on optimizing Flash content for mobile to include information on optimizing content for iOS devices (joining the existing Android content).