Edit : I have uninstall this version for now, too slow and don't enough time to customize it. I'll wait for a new release, Microsoft just release Windows Mobile 6.5 officialy today. I've installed Microsoft Windows Mobile 6.5 on my HTC Diamond Touch and it works :) I wanted to try this new UI and check how it looks like and how it works. The main screen looks very nice but it's still a bit slow to run... I haven't find the way to customize what I want to left on this new today screen. Then when you click on start here comes the new program list : It looks very clean too but it's just very very slow. The ROM I used to deploy Microsoft Windows Mobile 6.5 have been modify to put 4 icons per row (usually 3) The new today screen seems to have a code name, titanium, I continue to check what's new in there .... The link to the ROM : http://forum.xda-developers.com/showthread.php?t=482878 I think there is a way to customize this UI, I went through the registry and found this part HKEY_LOCAL_MACHINE\Software\Microsoft\CHome . Many things can be change and try.