Although it's not cheap by consumer standards, Logitech's BCC950 ConferenceCam is an excellent solution for businesses wanting to get into video communication without going to the much greater expense of installing traditional room-based systems.
Smart-looking; reasonably flexible design; High-quality audio and video; No drivers required; Works with a range of video conferencing applications; PTZ control via base unit or supplied remote
Expensive compared to consumer HD webcams; No monitor attachment for camera; Pan-tilt movement could be smoother