Yeah, that's exactly what I did. Basically, I took the power adapter from the hub (after double checking the voltage of course), cut off the connector and soldered on a standard usb port, essentially making a usb charger. Then it was just a matter of making a Y cable with all the right connections. The power lines are connected between all three, but the data lines obviously only go between the 770 and the peripheral. It works excellently, but, unfortunately, it's also a tad bulky. I specifically didn't solder the power adapter directly to the cable so that I can use any usb power source. My ultimate pipe dream would be to modify the circuitry inside the 770 to not only provide power (goodbye battery, ), but to also switch easily (maybe not automatically) between host and peripheral mode. There are way too many issues to actually try, so for once, I think i'll leave this to the experts.