This is sort of a good news, bad news situation. First the good news: Google Latitude is now available for the iPhone. The bad news: Apple wouldn't allow it to be made available as an app, so it's instead available as a web app. You can read the MacWorld report about it on Yahoo Tech. Google Latitude, as you may know, lets you view a map and see if your friends are nearby and makes it easy to send a message to them. To use the web app, point your iPhone's Safari at google.com/latitude.