iPhoney, an open pixel accurate web simulator for iPhone
Facilitate web development for iPhone
iPhoney, open source, is backed by Marketcircle. Do not confuse, iPhoney is not an iPhone app simulator. It is just a web simulator with 320 X 480 pixel. Now it is released V1.2. It is an open source project. You also can contribute to its development. If you a web developer, interface designer, iPhoney can be a very handy tool for you.
It also does not have technical support and necessary documentation, which makes iPhoney a little hard to learn and use. For some websites, the display is still problematic, for example for yahoo mobile.