Ustream.tv and Mogulus are live streaming websites where you can make a TV show that can be shown live on the internet and also can be recorded and embedded in a blog, wiki or website later. This is a newer technology that is not being used as much in the classroom. One reason may be because it is blocked in many districts, but it is being used all the time in professional developement sessions. (I have been in two sessions today that we streamed live to the internet for those who are not here.)
You could film special events that can only be seen with a password also. Think of the application...school plays, Open House, classroom news show, class lectures, classroom student presentationsetc.
How does technology extend the learning experience? That is how you should plan. How could this extend the learning in your classroom. This is cutting edge instruction - start dreaming and dream BIG!