We've taken a quick glance at Sony-Ericsson's Xperia X1 at CTIA. The phone is Sony-Ericsson's first to run on Windows Mobile, and features an iPhone-challenging three-inch, 800x480 touchscreen with a unique panel-based interface. The X1 also features 3G broadband as well as a QWERTY keyboard, a 3.2-megapixel autofocus camera, and expandable memory via microSD. Sony-Ericsson plans to release the phone late into 2008 but has not revealed prices, which will vary by carrier. Click ahead for the full gallery.