Making full use of the gesture based apps that iPhone supports, here is a cool app via Cydia: iShakeLock. iShake Lock allows you to shake the iPhone / iPod touch to either lock or unlock the lockscreen. Not just that, the settings allow you to set a vibrate alert while locking / unlocking the iPhone and also allows you to chose how you want to lock the iPhone (go to lockscreen or directly to sleep).
This apps lets you do away with the swipe to unlock in a really stylish manner and the best part, well its free 🙂
Search for “ishakelock” on Cydia