Sony Ericsson Unveils Xperia X1 Windows-Based Smartphone -- Smartphone -- InformationWeek:

"The first and most notable device in Sony Ericsson's lineup is the Xperia X1, a Windows Mobile smartphone with a touch screen overlay and a full QWERTY keyboard. The phone comes with 3G technology called HSDPA and Wi-Fi for a high-speed mobile experience. It also has built-in GPS for personal navigation."