Actually, only the newer ones use normal USB, the older ones need a (cheapish) adapter

Actually only the latest(?) version(s) of Kinect use regular USB, the older ones have s proprietary port that sorts looks like a display port plug (One of the corners is slanted). But the adapter is pretty cheap, and if you're a hobbyist/tinkerer it's a fun thing to play around with using the various 3rd party SDKs