So, what exactly is user replaceable this time around? Most people want the flexablty to add or remove what they please. With laptops, I know you cant do much, mostly ram and HD are your stuck with.
Well, given that you can easily access the internals of the computer without voiding your warranty and without risk of damage to the computer, the hard drive, the optical drive, and the RAM are all technically user replaceable. The battery would be, too, but Apple doesn't seem to be keen on making replacements easily purchased.