One of the many things you can do with your iPhone: destroy it.
So you have an iPhone and after a few months of watching movies and listening to music on it things are getting a little dull. Fear no more! The folks over at Lifehacker put together a simple introduction to getting those exciting Blackjack and Mine Sweeper apps onto your beautiful little glass rectangle. Apparently there is much more you can do with your iPhone because the book from which this how-to was taken is going to be coming out soon.
Install Third-Party Applications on Your iPhone [Lifehacker]