I'm sure that you've seen some of the messages that people send and receive on their iPhones, and you've wondered how to create your own (What? You mean that you thought they were all real?)
Nice and simple resource called the iphonetextgenerator. Fancy that, who'da thunk it? Add in your carrier, person, text bubbles and so on, and then generate. And save, and then you're done. Here's one that I created/copied from the website: