Apple today released the fourth beta of iPhone SDK 3.2 which is aimed solely at the iPad due for United States release on April 3. The update continues Apple's trend of bi-weekly updates.
iPhone SDK 3.2 provides support for developing iPad applications. This beta of iPhone SDK 3.2 includes the complete set of Xcode 3.2.2 tools, compilers, and frameworks for creating applications for iPhone OS and Mac OS X. These tools include the Xcode IDE and the Instruments analysis tool among many others.
With this software you can develop applications that run on iPad using the included iPhone Simulator, which runs iPhone OS 3.2. Additionally, you can develop applications for iPhone and iPod touch, which run on iPhone OS 3.1.3. (This software does not include all of the iPhone OS 2.x SDKs.) Installing the iPhone SDK 3.2 beta requires a Macintosh computer running Mac OS X 10.6.2 (Snow Leopard) or later.
The latest build of iPhone SDK 3.2 is labelled beta 4 (10M2144).