I can't confirm if it functions with other boards, but I can say that the second I plug it in the Caps/Num/Scroll lock LEDs flash for a split second (just as the other user). Otherwise, the board stays dead, but is recognized by the computer (just not usable).
I'm probably going to cave and return this POS adapter, in favor of a Griffin I-mate, as to Fohat's suggestion. I still want to work out the kinks with this one, though, and I'll see what I can make of it.