So far only the 770 will work. See http://www.internettablettalk.com/fo...hp/t-1211.html for more info on building the power injector. You need some way to power what you plug in, so this will do the job. If you're clever you can hack a powered USB hub to send power to the host port but that's a little more tricky since every hub is different and you could fry it in the process. All depends on how familiar you are with a soldering iron and voltmeter.

Larry