Kewl app alert: What the Font?

Some designers can look at a font and identify it off the top of their heads. For the rest of us, there's What the Font? and now there's What the Font for the iPhone.

Such a great concept: take a picture of the font you are trying to identify using the built-in camera on your iPhone and the software will identify it for you. And want if you have a Touch with no camera? According to the What the Font? site: "iPod touch users — you may not have a camera, but you can still get in on the action! WhatTheFont for iPhone will identify fonts in images saved from apps such as Safari and Mail."

Think that I can use this alone to justify the purchase of an iPhone?