You just saved me 30 bucks!

I have one of those 12V Cigarette adapters that has 2 USB ports on it. I could never get to work with my N900.

So, I popped it open, heated up my handy dandy soldering iron, jumped the two center pins on each USB port on the circuit board, re-assembled it, and Vioala! The N900 charges!

Thanks again!