I think it'll have two, in case you want to use PS/2. Most of the time, in the case of USB, it won't make much of a difference anyway, the devices don't take anywhere near the bandwidth of USB 1.1, and I'd be willing to bet that most people would just plug both plugs right next to each other, where they would be two ports, but going to the same controller, meaning sharing same bandwidth. Not sure what it would mean in terms of latency and polling though.