See if you have a Notification (Menu Bar Icon)

Does anybody know if there is a jailbreak tweak or add-on that allows you to see when you have a notification in your notification center?

I have a 3GS, so ideally I would like something that would function like a flashing LED that alerts me to a notification.

In iOS 5, after you receive a notification and the pop-up goes away, there is no way to see that you received any notification without opening the notification center.