Just like Macenstein, I can't actually tell you whether this photo is real, photoshopped, or just staged (my guess is staged), but it is funny. This iPhone, seemingly on display at the Apple Store, has one too many icons, and so apparently what the AT&T salesman told a customer in front of me at the AT&T Store when I went to buy my iPhone is untrue: you can, in fact, put your own applications on the iPhone. Who knew?!
That said, we at TUAW can't recommend you do something like this yourself-- those geniuses at the Apple Store don't get paid enough to put up with your mischievous behavior, so give 'em a break. Plus, it's only funny once. But this one time, it is pretty funny.