USB Audio in A/V Receivers?

[Loki]

Hey does anyone know about how you can plug into some of the new A/V receivers with a USB input? I know JVC is making them but I wanted to know if there is any advantage to it? Is it worth the extra $100 ? I would assume you would get a clearer sound because the signal is digital as opposed to analog and you wouldn't get any distortion.
Has anyone tried this setup before?