Hi, I would like to replace my current cell phone. I Was considering an iphone. I'm a complete newbie so be gentle. Does the iphone interact with a Mac computer without attaching it by usb? Can I transfer music or media from my computer to the iphone without attaching it by usb? Does it have bluetooth? What can I do with an iphone besides making phone calls? Why should I consider an iphone over a Blackberry or any other phone? Thanks