Slide2Unlock2 (S2U2) 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. And it’s has a CallerID function.

Changes:

– fixed the problem when start-up on Landscape mode on some devices.
– fixed the problem when changing orientation on some devices.
– fixed the occasional problem that the device is not locked when power off.
– improved the compatibility of DirectDraw.
– a few minor bugs fixed.

http://forum.xda-developers.com/showthread.php?t=412418