Yahoo Video + Skype (Score 2, Interesting)

For a while we had two workstations set up, one in Dallas and one in Northern Virginia, each running Yahoo Messenger hooked up to a web cam with Skype for audio. Skype was really good at handling the feedback you normally get with an open microphone plus speakers, but speaker and microphone placement was critical. The setup was eerily effective, and allowed people in the cubicles neighboring the workstation to yell across from one office to another. We turned it on the morning and left it running all day. Eventually the people at the remote office decided that the setup was a little too effective for comfort and stopped turning it on, leaving them free of annoying interaction with their putative colleagues.