According to this ThinkSecret image (on right), the calculator in iPhone will be pretty lame. Here's one that I've been working on. I posted an earlier version elsewhere, but it's been updated quite a bit. It still needs some prettying up, but it's getting close. However, I'd love some feedback, especially from someone with an actual iPhone. It's meant to be used in landscape mode. I can't figure out if the "mouseover" event will show up when an iPhone user "taps" the buttons or if i need to implement something else. Thanks for looking.