The latest tweak from Cydia called MountainLionCenter allows you to have a more natural, sideways notification center on your iPad. MountiainLionCenter is a simple and elegant tweak that gives you a option for those that have come to love the notification center on their MacBook in Mountain Lion released a few months back.
Check out the video tutorial for MountainLionCenter on the iPad by Jeff:
MountainLionCenter is available for FREE from the BigBoss repo in Cydia. Definitely worth a try!