Apple, or someone must do this. I use to use this a lot on my BlackBerry, it's a messenger to send messages to other Blackberry users, I believe it uses EDGE. All messages are free and it gives a very nice status report on your messages, when it's sent a check mark appears, when it arrives to your friend's BlackBerry, it will tell you the message has been delivered, when your friend opens up the message and reads it, you will be informed that your message has been read. You can also send quick pictures over it. It didn't count from your SMS or MMS. I really hope someone can make this, especially now since the number of iPhone users will increase.