In the past weekend, Apple released the new iOS 5 beta 5 for developers and early adopters from beta program. There are some changes added to iOS 5 beta 5, and according to some people, this release is pretty close to the last beta, if not the last one before Apple release the final product for iPhone, iPad, and iPod Touch. The release might also coincide with the launch of iPhone 5.
There are some updates in this release, including for the AirPlay. Starting from this release, the video content in websites and apps are enabled by default. It also supports video via AV now. The Apple TV software is also able to mirror the contents on iPad 2 into the second generation of Apple TV using AirPlay. However, you have to register your UDID in iOS Developer Program Portal to enjoy Apple TV Software.
But the biggest change on this release is to the iCloud storage. They remind you to not store any important documents because the server might be purge periodically. The case sensitive file name is also a problem here, as it is case-sensitive in iOS, but not in OS X. so it might lead to problems when you syncing files. You can check the full updates from BGR here.