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:

– added option to automatically close S2P when the headphone (either Bluetooth or wired) is disconnected.
– added optional nopic.png to differentiate no pic caller & unknown caller (unknown.png).
– fixed the display displacement problem on Smartphone & WVGA devices.
– fixed the problem when the lang.ini was too big, some translation phases would be omitted.
– a few minor bugs fixed.

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