Yeah, the only phone that I know of that you can do that on is the LG VU920. Sorry

You are lucky I don't put your cookies count in the minus.

. Yes you can put an iphone theme on the vu but it doesnt allow you to run iphone apps.
Agoat I also had a LG VU920 hacked like a iPhone(and a HTC Hero which I liked better lol), the point is it's not that it can run the iPhone apps it's that you can have your "Widgets" all on the screen where you can just tap and get into them without having to go to Menu/Games&Apps/whatever app you want open. Just so much more convenient. I would have my homescreen have Google Maps, Gmail, 2 Browsers, "Live" weather, New Message, Alarm, recent Messages and Recent calls. They would all fit nicely on our Impression Screen(they did on my Vu and that had a smaller Screen). The one tap on any of these widgets and your into what ever you want in a flash. Not to mention the slide to unlock just like the iPhone was very nice on my VU