Here's a YouTube video that illustrates the user interface of the Sony Ericsson Xperia X1:
By the way, I also read at Engadget that the Xperia X1 phones are manufactured by HTC.
Sony Ericsson Xperia X1 user interface video
Posted on Monday, February 11 2008 @ 0:01 CET by Thomas De Maesschalck