I ordered a Western Digital 1TB portable drive on Amazon and it arrived today. I wasn't expecting it to be as tiny as it is - not a lot bigger than my iPhone. And it holds a terrabyte! Obviously I don't know what the insides of my 15" MBP look like, but I can't believe that this 1TB drive wouldn't be able to fit in there. Lose the CD drive I've used about three times in two years and you'd be able to get 2TB in there. So why is 500GB still the maximum?