Chatterbox from VoSKY is a simple plug and play USB speakerphone for Skype. Though, it doesn't require any drivers to be installed but does require Windows XP, and supports echo cancellation and full duplex audio.
The Chatterbox weighs 50 gms, has an headset jack, Volume, and a Microphone mute button and LED's to show status. Price: $29.95.
