I was frustrated when the Apple event came and went without announcement of a new iPhone OS. By the same token, I was intrigued by the iPad's user interface. I remember thinking "when are we going to see this on the iPhone?" It's definitely not official, but a YouTube video provides instructions for how to transport the OS over to your iPhone. You'll need a jailbroken iPhone, Cydia, and a few minutes to watch the video. It's neat and all, but be sure to check out the battery levels through the video - the results are quite interesting.
As always, installation of things like this are done at your own risk. Are you willing to take the plunge? Hit the video for more information!