Hello
I have (finally - sigh) changed from Windows PC to Apple and am now wondering if I can just use iTunes 10 with all my previous music, data etc on my JB+UL-ed iPhone 3Gs or will it not work ?
As far as I know, it should work fine. Make sure that your iPhone is set to "Manually manage music and videos" so that your entire library won't get erased because of the new, empty iTunes library on your Mac.