I just participated in a web conference on a free service called Yugma, which I had to research after I got off.  Free is in my budet so I'm looking into it further.  Heres what I found from them in a nutshell. 

Yugma is a free web collaboration service that enables people to instantly connect over the internet to communicate and share content and ideas using any application or software. Whether you are using Windows, Mac or Linux computer, you can connect on-demand and real-time with co-workers, clients, friends and family -- regardless of whether they are across the city, nation or even the globe.

I figure this is a good tool if you have buyers out of your area.  You can collaborate with powerpoints and the like. 

So what's a Yugma: The name Yugma is a word from the Sanskrit language meaning "the state of being in unified collaboration."