10 people or less is not that many. I would recommend Flash it is a very simple program to use and it is on 99% of all pc's
Macromedia flash server
if you are going to start going out to more and more people you may run into problems after about 50 or 60 at a time. I can get expensive after that. however going to ten people or less it is very inexpensive tool
There are some other options of course there is windows media, Real audio (I would not recommend) as well as others.
We have used Flash since the beginning of PrivateCamZ.com it is a great tool. There is a chat that comes with it and it very easy to use once it is set up. Both for the person sending the stream and the people watching it.
It also makes you much more versatile with what you want to do with that stream, archive, and more.
Please feel free to drop me a note anytime at
dan@camz.com