You shouldn't have to flash from usb. jetway's website has a flash utility that can be ran out of windows..
http://jetwaycomputer.com/Download.html
click the third link which is to flash from windows.
Also, I've been running very stable for a while now. Now hiccups with anything especially my front end (SD). everything is fast. Even the visualizer through the SD runs awsome, which i should point out I was never able to see working at all before on my reg. VIA board.
One issue I have yet to resolve is booting with no keyboard. I haven't had the time to mess with the bios though. All in All a great purchase. Anyone know off hand the settings in the bios I need to change to remove the keyboard from booting.