Some of the many features include
CallerID support on phones supported
Slide2Answer to answer an incoming call automatically by using the slider for unlock
Plugin control for S2P (a media player application from S2)
Greater Power Management
Show SMS/MMS/Email preview
S2U2 requires WM5 or WM6/6.1/6.5 Professional. Click here to visit the download page and choose the appropriate download based on your screen resolution (for instance, my HTC Touch HD has a WVGA screen resolution.)
Download the ZIP file onto your desktop, unzip and upload the “S2U2-2.02-VGA.cab” file onto your Windows Mobile. Run the CAB file from your Windows Mobile to perform the installation. Once the installation completes, the shortcuts appear under Start – Programs – S2U2. You would see iLock, S2U2 & S2U2 Settings.When running for the first time, run iLock before running S2U2.
The S2U2 settings menu offers a wide variety of customization ranging from caller-id to power management, wallpapers etc and as you can see gives a iPhone like look even on these windows.