Here's an update on this project. I ended up buying a cable to see if this would work as a powered usb port. It doesn't work. I ended up getting a powered mini-usb hub from Radio Shack. It was $25 but worth it so far. It also allows me to power the hub with the Minty Boost charger.

Here is the url http://www.radioshack.com/sm-buy-the...i-2463878.html

It's a very nice unit and it allows you to power off of a battery usb pack. The hub is small and has a y power cable that works with the mini usb port of the N800. I think that the Y power cable solution won't work. The powered hub solution does.