After seeing the last web show, ..which I did enjoy. My suggestion is that I think that if somehow you could set-up ahead of time a teaser about an 'event' that will happen on the show, that that would interest people and they would be more likely to tune in. What those events are I am not sure....we just need a little creativity. Stand-on your head and insert a couple of ping-pong balls?
I don't know, just thought I would give my 2 cents.