What I thought was hilarious is how the non-iPhonish gestures seemed to be just random to me. The lady was all moving the dock-like thing up by grabbing it, and I just thought, "why?"
Why not? Being able to bring up the dock while in another app is a great way to provide convenient access to apps without compromising on screen real estate. Apple did this on Mac OS X by allowing the dock to auto-hide and reappear if you bring your cursor near the border (in a non-full screen app, i.e maximised Safari/Firefox), of course this method is unworkable with a smart phone, since the screen is too small making it far too easy to inadvertently bring your finger or stylus to the border. So Palm did the next best thing- allowing you to bring up the dock by dragging your finger from OFF the screen.
Come on guys, I own an iPhone 3G and think it's the best overall smartphone out right now, but let's not be daft enough to think that it's (or any future Apple product) the end-all of it's category.