I am starting to think Nintendo doesnt mean just any old analog stick/nub, otherwise they wouldnt mention it being a 3D analog stick in the press release, but just an analog stick. Im thinking an analog stick of some sort that can also move along the z axis, if only slightly, as well as the 360 degrees an analog nub can detect. Imagine a nub that instead of being raised in the center, is depressed, fitting your thumb. Now imagine it being made of rubber, and once again, functioning as a normal nub, but one that can also "sink" into the 3DS. Of course, it would have to be on some sort of spring system to provide a good amount of resistance etc. Exciting.