We just released an updated version of Upvise client for Windows Mobile. It now fully supported the high resolution VGA screen running Windows Mobile 6.1, such as the latest Sony Ericsson Xperia and the HTC Touch Pro.
It gives very nice smooth fonts and auto detection of screen orientation as well
We also added enhanced supports of touch screen, you can now use your finders to navigates within Upvise just like the iPhone!
To install it, just type in http://upvise.com in your mobile web browser and click Download