Do you want to create a list of everyone in the world that has an iPhone?
Here’s how: Simply write a script to cycle through every possible phone number, and mimic the web service call that the iPhone Messages app uses to see if a phone number has iMessage capabilities. See below for a screenshot showing how Messages does this.
And yes, I know the receiver has to have iOS5 for this to work, but eventually most iPhones will have iOS5.
Take the First 