Apple has released Xcode 4.1 Developer Preview 3 to developers for download
This is a pre-release version of Xcode 4.1 for both Mac and iOS development. This release requires Mac OS X Lion Developer Preview 2 Update and includes iOS SDK 4.3. Continue to use Xcode 3.2.5 or Xcode 4 on a Snow Leopard partition if you plan to submit Mac or iOS apps to the App Store.
Whatʼs New in Xcode 4.1 Preview 3 Updated to support Mac OS X 10.7 Lion preview 3 and include iOS SDK 4.3 Improved Assistant editor logic when switching among different file types Fixed a bug that prevented indexing of some projects Fixed a bug related to nil settings in the Core Data model editor Fixed a bug in LLVM GCC 4.2 and LLVM compiler 2.0 for iOS projects Additional bug fixes and stability improvements
You can download Xcode 4.1 Developer Preview 3 from Mac Dev Center.