How can I fix a fried USB bus?

After I moved, I erroneously connected an adapter that puts out 12 volts (from one of my external hard drives) to a powered USB hub that was supposed to have a 5 volt adapter. (I didn't think that you could do that...I thought they were all sized differently). When I connected it to my MacBook pro...everything went dark, and it cannot be restarted or booted. No trickle light showing in the front...nothing. Battery is fully charged. I tried all the normal remedies. Zap pram, hold down power button without battery and an apple technician did that other reset.

Stupid me also managed to fry the USB bus on my iBook before realizing the problem...and then i realized that last week I did it to my airport extreme.

I'm in a jam...any ideas?