Hi. I have a MacBook Air and an iPhone 4. For six months I've used PdaNET as my primary means of getting Internet to my Air. PdaNET offers three ways to get Internet from your iPhone to your computer. The first is to create a hot-spot out of your iPhone. I find that method to be constantly unreliable to the point it just doesn't work (or perhaps I'm using it wrong). The second method is for you to creat a computer-to-computer hot-spot and the iPhone joins that hot spot. I'm not too savvy and have been unable to get this to work. Anyway, for the past six months I used the USB option. You take your iPhone's connection cord and just plug it into your computer. You use a tiny little free PdaNET app on your computer and simply select "connect." This method has worked great. I downloaded iTunes 10.5 an hour ago. It seems to have "severed" that link somehow. I've tried everything I know to try to fix it. Anyone else having a similar problem? Thanks.