Microsoft Chairman and Chief Software Architect, Bill Gates, has officially unveiled Windows Mobile 2003 Second Edition at Microsoft's Mobile Developer Conference. The Second Edition contains some significant enhancements, the most interesting of which is the ability to switch the screen orientation between portrait and landscape modes.

"The convergence of the mobile and PC development environments represents a tremendous opportunity for software innovation. Microsoft is proud to support our hardware partners and the developer community by providing innovative software like the new Windows Mobile 2003 Second Edition software," said Ya-Qin Zhang, corporate vice president of product development for the Mobile and Embedded Devices Division at Microsoft. "At this show, we are also focused on providing the best integrated tools and technical resources that will ignite application development and bring new value to customers and the mobile industry."

Brighthand has published an overview of the enhancements to the new OS. You can access that article at the link below.

PDAFrance has published multiple screen shots of the new OS and that is worth a look as well.