nope. They have no inputs and being usb theres no way to add one.
I initially bought these too, not thinking, and the problem I ran into is when you want to switch to your systems speakers (I have some 100w'ers and wanted to crank the tunes while I built) ... you just can't. At least win7 can't. When you disconnect the usb audio it doesn't automatically switch whats playing to the next playback device. Since I do this kind of thing often, these got returned.
edit - just to be clear how these work, they have their own usb powered soundcard built into the headset. They are not digitizing and routing audio from your soundcard and transferring it over usb; which is why they have limited compatibility. They are another playback device just...