mVox USB Speakerphone
Check out the price
I got one of these about two weeks ago and I must say I'm delighted with the performance.  I use it with Skype and Gizmo Project.  The clarity and echo cancellation is excellent -- better than the headset and mic I used before.  <br /> <br />BTW - I bought this device at Radio Shack for $10, not $40.  The price dropped just recently.