Apple has released iOS 5 beta 3 build 9A5259f to its registered developers which is compatible for iPhone 4, 3GS, iPod Touch 4G, 3G, iPad 2, iPad 1, and Apple TV.
Along iOS 5 beta 3 release Apple also pushed a new iCloud for Lion beta, iTunes 10.5 beta 3 and Xcode 4.2 Developer Preview 3.
At WWDC 2011 the iOS 5 was unleashed with about 200+ new features, and the first beta was out there at the event whereas iOS 5 beta 2 was released by the end of last month. The final iOS 5 will be available in this fall with the release of new iPhone.
Apple registered developers can download iOS 5 beta 3 through iOS Dev Center which requires iTunes 10.5 beta 3 to Sync.