The one thing I was thinking about while looking at these was how badly one needed to be the alert view "pop" from iOS. Such an aesthetically pleasing effect that gets the UX metaphor across extremely well.
You mean besides the fact that you can't call your build of Android, Android without Google's permission? The fact that Google still hasn't released the sources to a 7-month-old "open source" OS? Yeah, Android is totally "open."
Except that those boil down to a couple of basic gestures: tap, pinch, swipe. The hardware buttons are irrelevant in this case. Oh, and swipe to delete? That's in the "manual" that comes with the device. It's smaller than a dollar, for god's sake.