We've been fooling around with HTC's Touch, which comes equipped with the redundantly named TouchFLO shell / UI add-on for Windows Mobile. It's a pretty quick video, so check it out if you wanted to see how exactly this thing works with the sweeping motions of your finger. (Apologies in advance for its low-fi-ness, we only had our crappy point-and-shoot handy when shooting.)
[MP4] Download the video (VGA) [MP4] Download the video (QVGA) [AVI] Download the video (VGA) [AVI] Download the video (QVGA)
Update: Yeah, we know, the videography kind of sucks. Check out Phone Scoop's demo, they do it up right (as always).