The World Clock!

Okay, I know the iPhone includes most of what is in this web application right in a widget, but I thought I'd post it anyway for two reasons: it is really well developed with a precise and accurate way of adding a clock based on Google Maps and there isn't that much to talk about in term of iPhone tips. Third-party development is not really here yet and web applications are pretty limiting. Like I just said, what is great about this app is how precise you can be when adding a city. You don't have to choose within a predetermined list, you can really choose your city on a Google map. You can check it out at http://www.worldclockr.com/mobile.html