Apple Releases iPhone OS 4 Beta 3 and SDK to Developers
Following a trend of biweekly releases it established with earlier developer seeds of iPhone OS 3.2 for iPad, Apple has released the third beta version of iPhone OS 4 and the associated Software Development Kit (SDK). Available to registered...
http://www.macrumors.com/2010/05/04/apple-releases-iphone-os-4-beta-3-and-sdk-to-developers/