S2U2 (Slide2Unlock2) is a simple lock/unlock application which has the iPhone style slide unlocking. It can be used as a screensaver while you don’t use your device. It has a CallerID function (but some devices may not work, so please try it first); S2P control plugin; and volume control.

Changes:

– lock the Home key of Touch Diamond/Pro/HD.
– fixed the occasional problem that the date of an appointment was shown incorrectly.
– fixed the occasional problem that under Power Safe mode, the device behaved weirdly when another program running in the background (again).
– a few minor bugs fixed.

http://forum.xda-developers.com/showthread.php?t=464695