I just finished a test of the version 3.5 version of DimDim and I was amazed with how far they have come! In their next release (v4), they have promised Mac Compatibility with screencasting as well as the ability to record meetings!!!
I do not know what the payoff will be for allowing teachers access to a web conferencing service, but I am determined to give it a try. The service will provide an opportunity to connect with live video and VOIP with desktop and file sharing capabilities. This can be used for a variety of things such as Interviews, work on class projects, last minute help before a final, etc. The list could go on and on of innovative uses for this communication tool, however, who is going to find it useful and actually use it?