iOS 5 Beta 2 has been released by Apple today. Only the registered developers can access the original iOS 5 Beta 2 IPSW. It is advised not to get iOS 5 from other sources and upgrade to it in the case of not having a developer account as it may cause many issues. Better wait for the public release of iOS 5.
Do Read : iOS 5 Features – What’s New In iOS 5
When going to details of changes in iOS 5 Beta 2, it fixes some bugs, improves battery life and brings certain other performance improvements as we usually see in beta releases. If you have a developer account and the access to the iOS 5 Beta 2 IPSW, you could get it from the dev center (link below).
Download iOS 5 Beta 2 IPSW from here