SKYPE.
Many of my offshore clients have been using Skype for videoconferencing since 2005. All that they need are some inexpensive PC's for their boardrooms, some plasma or lcd screens, some logitech cams (
Good deal here) and a mediocre internet connection. Calls are FREE.
It will save them tons of money and it can even be distributed throughout the enterprise. Plus with skype's add-ons like desktop sharing and collaboration, meetings can be interactive.