I upgraded to an iPhone 4, but would still like to use the 3G as essentially an iPod Touch. Before I do anything stupid, however, i wanted to check in with the experts. My fear is that when I plug in the iPhone 3 iTunes will sync to that instead of the iPhone 4. I did not think of changing the name from the default "my name iPhone" when installing. Any suggestions? I can back up in time machine revert, I suppose, if anything goes wrong.