So after some time away from the iphone trying rival OS's, I've decided that nothing is as smooth or well thought out as the iPhone OS. Even something as simple as scrolling is so much better than the competition. I also bought Apple TV recently so I will be able to use itunes for all my media. I've got 2 iPhones coming this week for me and the missus. As well as an iPad the end of April (price permitting). Will it be possible to run all these of a single itunes account? Do I just need to buy an app once to use it on both iPhones and the iPad? What about all the games I'll be buying that the missus won't want on her phone and the shopping apps etc she'll buy that I won't be using?