A great tongue and cheek review (by John Dvorak) on how cell phones and all of the bells and whistles that come with them are really just time wasters.
Let's face it, goofing off is goofing off. Pretending otherwise is… well goofy.
The funniest part, many of the comments are arguing with him about how they use their iPhones to do things like fly over a friend's house as examples of useful productivity (the killer app).
Don't get me wrong, every tool has a purpose. But if you are goofing off, don't confuse it with productivity. Oh, and get back to work, the future of the world depends on it.