if all else fails for your USB device connected directly, you could always grb a Cradlepoint PHS300 (3g/wifi router w/Li-Poly battery) and connect your 3G USB dongle to it then use wifi to connect to the router. It costs about $150 but it will save a ton of time and you get better power management (I think) by connecting over wif rather then powering the device via the USB port. Some have mentioned a powered USB hub too...but to simplify I feel the pocket router is the better option as it's easier to manage and there is zero learning curve to figure out how to get it working via USB on the tablet. I use a Cradlepoint CTR350 with an external battery pack to connect over my Franklin CDU680 to the Sprint EVDO. BTW, both routers now support HSDPA and EVDO Rev.A But check to ensure your device is supported. I am assuming you want this all for portability/to be mobile.