Xperia X1

The Xperia X1 will launch on September 30, and that’s official.

It will initially be available to customers in the UK, Germany and Sweden, rolling out into other markets across Europe, Asia and Latin America later in the fourth quarter (Q4) of 2008.

Sony Ericsson’s XPERIA X1 is a step in a new direction for the company, pushing not only a large, tactile QWERTY keyboard (hidden under a curved “arc-slider”) but Windows Mobile 6. Previous Sony Ericsson models tended to use a custom version of Symbian, the same OS used by Nokia.

A motion-sensitive screen reorients depending on, uh, orientation—very iPhone—and a new “Panel” interface that can be used with the touchscreen without sliding out the keyboard. The screen is huge and high resolution, the processor should be plenty powerful, and it’s got the standard complement of 3G and Wi-Fi built in.