Wrong, oh Posty one
Let's take this one connector at a time.
There are two USB ports next to the PS2 connectors at the rear of the case (that's 2)
The USB2 connector has two rows of pins. One row has the two end pins missing and according to the pinout diagram for that connector, one end pin is GND and one end pin is VCC. The GND pin missing maybe insignificant because there is another GND pin next to it (in the same row). But the VCC pin missing cannot possibly allow that port to be used as a normal USB port.
There is no pinout diagram for the d-bracket connector so I cannot determine if it could actually be used as a normal USB connector. I'll have to try it out.
So, best case, I have 5 normal USB ports and 1 PC2PC port
Worst case, I have 3 normal USB ports and 1 PC2PC port