Qik is a video sharing site with a unique twist. Instead of taking the video with a camera or phone and sending it to an video hosting site like youtube. Qik allows you to stream live video from your telephone. So as long has you have a mobile phone signal you can stream video from practically anywhere. (Yes you too can have your own reality TV show) I think this would be an excellent application to use on field trips, sporting events, and classroom how-to-videos.
It is simle to set up and install. Go to the qik website and click join on the top right hand of the screen. They dont ask for any personal information, just screen name and password. You can install it on your phone via SMS and you are ready to go.
Here is an example...