I have two of these devices and they seem to be pretty kickass as far as hardware specs. The firmware on them is a different story!
I pulled the board out of this one to check it out, but that's about as far as I have had time to get. I'm not sure what the deal would be with the modem side of things either... I'm guessing that could be a problem?
That sucks... without either wifi or xDSL working I guess its not really worth doing. I do remember reading something about the proprietary driver issue with broadcom DSL stuff.