A nice feature is the question and answer box. It's essentially a chat box that allows meeting participants to participate actively. I have asked if there is an alternative to calling in.
While I wait for them to get to the questions I am cruising around making journal entries and actually going to prosper to look at some of the options shown in the webinar. I will have a better chance to get into the details at the real-life seminar in San Francisco next February, anyway. Too cool, that.