This post is short but sweet. I discovered today an iPhone emulator developed by a guy named Shaun Sullivan. Unfortunately, there is no way to totally emulate the iPhone on Windows but what Shawn has done is made an executable that runs a Windows build of WebKit and embeds it inside an iPhone-like shape. I had a play with it and it isn’t perfect by any means but it is the best solution I have seen for helping Windows users understand how their website shows on the iPhone.
If you’re a Windows user try it out: http://code.google.com/p/ibbdemo2/downloads/list?can=1&q=
Most things rendered similar to how they actually appear on my iPhone but the use is much clunkier than on the actual iPhone.