Bellow is the current list of iPhone optimized websites. If you have more to add please feel free to let me know so that I can update the list!
http://iphone.jiwire.com/ WiFi Finder
http://www.cbsnews.com/ iphone CBS News
http://iphone.foxnews.com/ Fox News
http://iphone.newsclicker.com/ Breaking News From Around The Globe
http://mobile.latimes.com/ La Times
http://www.weather.com/iphone Weather.com
http://www.diepresse.com/files/iphone German News Site
http://sportstap.mobi/ iPhone Sports Portal
http://digg.com/iphone/ Digg
http://iphone.facebook.com/ Facebook