It should work just fine, but I'd be cautious of expecting too much power from there ports; they weren't designed for the purpose you'd be using them.
I'm exploring the idea of hooking a DAC to the Samsung LN40A630 TV to use with a couple of external speakers. The DAC in question is powered via USB, such as from a USB port on a computer. Since the Wiselink port is USB, I'm guessing it would work as a power source, but I figure it's worth asking first. Do I have that right? It would be a passive connection, i.e., I wouldn't be otherwise accessing Wiselink except as a power source.