A new jailbreak tweak to hit the Cydia Store is Emblem, which can apply OS X-style notifications to a jailbroken iPad.
After downloading and installing the tweak, incoming notifications will “pop-up” on the top-right of the iPad’s screen, just like how OS X notifications appear on a Mac. Touching such a notification launches the respective application (i.e., the Messages app for iMessage notifications), and swiping the notification dismisses it.
If more than one notification appears at the same time, Emblem will first display the notifications separately, and will then combine them to create one cluster of notifications. Swiping through this notification cluster will display each individual message, which is a nice touch.
All in all, Emblem is an impressive jailbreak tweak. If the iPad notification system doesn’t cut it for you, consider downloading and installing this replacement system from the Cydia Store (via the BigBoss repository). Currently, Emblem is available for $1.99.