We have had this RoundTable gadget from Polycom lying at the office for sometime now. Its basically a  high-end webcam. It sends out two images to the laptop.

The first is a panoramic (360) view of the office. Useful to catch those lazies falling asleep during our calls.

And the second is an image of the speaker. There are 6 cameras mounted on this gadget and it detects the location in the room from where you are talking and automatically shows the image from that camera!

A very useful feature, I think, is that it makes our tiny conference room look pretty big. :)