White Noise
Head-Fier
This is a great example of how little I know about microphones. If I ever decide to try a professional recording interface, run the other way!
Not having opened one of these things up, and not being an engineer, I expect it'd be filled with op-amps and other magic black boxes. And some of these things do 48 volt phantom power off of USB... (the one I linked has a dedicated power supply, but the lesser models don't). I imagine it wouldn't be too difficult for you to do better. The software and drivers for these things are serious schiit though. Stay out of that mess!