http://www.macrumors.com/2008/06/26/apple-seeds-iphone-2-0-5a345-itunes-7-7-beta-sdk-8/
Apple has seeded developers with Beta 8 of the iPhone Software Developer's Kit (SDK) in preparation for the upcoming App Store. Alongside the latest SDK, Apple has also seeded a pre-release of iTunes 7.7 as well as a new version of the iPhone 2.0 Firmware.
A detailed list of changes are not yet available, but Apple is now accepting Apps into the iPhone App store.