Following the Mac OS X Lion first developer preview release, Apple has now release Xcode 4.1 Developer Preview for those who are running Mac OS X Lion.
This is a pre-release version of Xcode 4.1 for both Mac and iOS development. This release requires Mac OS X Lion and includes iOS SDK 4.2. Continue to use Xcode 3.2.5 on a Snow Leopard partition if you plan to submit Mac or iOS apps to the App Store.
The new Xcode 4.1 user interface and feature list can be checked by visiting this link. Apple has also made Xcode 4.1 release available through a Mac App Store Redeem Code.
Download Xcode 4.1