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:

– removed the data connection monitoring as it might cause battery drain on some occasions.
– removed option “Always Hide the system incoming pop-up” as it did not always work.
– fixed the occasional system hang or cannot answer/end on the CallerID screen.
– improved mute ring response (press the Volume Up/Down).
– when dismiss the missed call details, the missed call notification icon will also be dismissed.
– a few minor bugs fixed.

http://forum.xda-developers.com/showthread.php?t=527523