Half of the projects I am discussing last month is connected with online video streaming.
Yes, YouTube has changed a direction of thoughs of many people with it's price :)
Pity, but most of people who want to do something like that just emphatically keep wanting a freebie - to make a million paying a thousand or two.
What I recommend to look at is a site Stickam.com. I enjoy their video chat feature.
If you have a web cam and a good internet connection - you are ready for web conferences.
Try - it is great.
Now I can discuss projects using a video conference with my customers.