What I am anxiously hoping for is a functional and useful lock screen for notifications. the iPad and iPhone really need to have a daily calendar view on that screen for your upcoming appointments / tasks and an icon badge to show you how many SMS/MMS or E-mail you have unread. A voicemail indicator would also be useful.
Putting all that on the screen may be clunky, but it would be very helpful and useful to give the end user the ability to select any, all, or none of the status items on that lock screen.
I am not, however, a fan of using the lock screen to actually be able to manipulate items like you can in cydia springboard. Kinda defeats the purpose of the "lock" screen.
I didn't really expect anything dramatically different in terms of interface because the iPad runs the same OS the iPhone does. It's just a .x version chance, not a x.0 change. I'm willingly to bet that we see dramatically new stuff tomorrow in iPhone OS 4.0.