mVox Electronics introduced a portable USB speakerphone that works with Internet telephone applications such as Instant Messenger (IM) and VoIP. The device uses a DSP to deliver full-duplex voice quality as well as echo and background noise cancellation. It comes with a headset that allows users to have private conversations. The price is $39.99 and it will be sold online at Amazon.com, Target.com, eCost.com, VOIPSupply.com and SharperImage.com and at Sharper Image and Radio Shack retail stores across the country. www.mvox.com