BlurriedNCBackground is a neat jailbreak tweak that adds some pizazz to notification enter. After installing instead of having the dull background when pulled down, notification center will have a blurred see through background.
You can download BlurriedNCBackground for free through the BigBoss repo in cydia.
A simple tweak to remove the default NotificationCenter linen background and put a blurried screenshot instead.
Note that it will slow down the opening of the NotificationCenter due to the time required to blur the screenshot, until you enable the ‘Asynchronous’ option.
You can configure this tweak in the Settings app