I have an iMac at home and a MBP, and was surprised to find that my iPhone can't sync music/movies with both of them. I found this hack that tricks the iPhone into thinking 2 different iTunes libraries are actually the same- http://www.andrewgrant.org/2008/03/30/how-to-sync-an-iphone-with-two-or-more-computers.html I was wondering if anyone had tried this. At the bottom of the comments, people have said it works with iTunes 8, but one poster had problems retaining downloaded apps. But I'm thinking you might be able to just backup all the apps before doing the hack, then copying back into your iTunes afterwards (as well as any other purchased content from iTunes.) If I can get this to work reasonably smoothly I'd like to do it. Anyone tried it?