LockInfo does that... and if you like the default Notification Center look, LI provides a way to just have more control over how things are displayed in your Notification Center. And you can also useNotification Center widgets in your Lock Screen. It's well worth the low price to buy it!! Even if you don't use the extra plugins at all.
I know lockinfo will do that, but I was hoping to avoid installing a new program just for this. I guess I want to keep things as simple as possible.