The next time your over at a friend’s house and want to share images from your iPhone, check out their TV as an option. Connecting will take a cable out of the iPhone to the TV’s input, unless they have a AppleTV2. With the AppleTV2, you can easily AirPlay from the iPhone to the TV via WiFi. You can actually share more than photos to the TV, it is also possible to share documents from your iPhone to the big screen.
This normally takes a few different apps or changing a bunch of settings as you go from friend’s house to another friend’s house… they all want to see your iPhone creations! I have started using TVOut Genie that handles all of the different kind of connections as well as different file types.