At first, I didn't think this Phoenix Audio Duet USB speakerphone was really necessary — I mean, using a headset with Skype should be enough, right? Well, according to the VOIP-heads over at VOIPSpeak:
a USB sound device is much more efficient than using a soundcard for VoIP applications... With a USB audio device, the device converts the audio into digital signals before sending it to the computer. This results in much better sound quality and compression which can have a dramatic efect on VoIP conversations.
Phoenix Audio Duet PCS Review [VoIPSpeak via UberGizmo]

