My organization is pretty committed to Brainshark, but I think Prezi would fit some training needs as well. Is it possible to create a Prezi and then download the presentation and upload to Brainshark as a “movie” file? I can put things like an mov file on Brainshark and send people a link to view it. The Brainshark server works well with that.
As of now direct export of prezis as video clip is not supported. There are many screen capture tools - like QuickTime Player - which help you doing that.