I was recently listening to a podcast, sorry I don't remember the actual podcast to give credit. One of the statements that caught my attention was a reference to a video conferencing application called dimdim. The main reason it sparked my interest was that the integration pack required to make this application work within  Moodle had been developed. I have only experimented with a couple of short practice sessions, but the possibilities are exciting. The dimdim integration with Moodle allows an instructor to add an activity to a course, set the start and duration times, and have the ability to have two-way audio and video interaction with remote students. Dimdim also includes the ability to share documents, applications, and an interactive whiteboard. I hope to share more specific information about uses of this application as I have more time to explore its capabilities.