From the previous posts, it looks like tba and psychotech both had theirs powered by usb. Perhaps they will comment, if not, you could try a pm to see how they hooked theirs up.
That may be a micro-usb connection (not a mini-usb), if you have one of those cables around somewhere, give it a go.
What cables did it come with?
If you got a car adaptor cable with it, and it has that micro(?) usb end on it, you could probably cut it off and splice it to a regular usb cable to hook to your pc (or hub).