I give regular talks in a series entitled "Dr. Knop Talks Astronomy" as part of MICA's public events. These talks are in Second Life, so people from all over the place can come to them.
if you've missed them, and want to catch up on them, at the site above slides from most of my talks are archived, as well as MP3 files of the audio in many cases. However, there are now three of the talks online that have been recorded fully in video. Of course, it's not the same as being there, since you can't ask questions and interact, but it might give you a sense of what goes on at these things.
The first one is a talk about how we know that Dark Matter exists that I gave several months ago; this talk is online at PookyMedia.
More recently, Geo Meek has recorded my most two recent talks, and there is now a Dr. Knop Talks Astronomy channel at livestream. The two talks online there are one all about redshift (the Doppler shift, gravitational redshift, cosmological redshift), and my talk a few days ago about black hole misconceptions. Special thanks to Spike McPhee (aka Paradox Olbers) for supporting this latter effort!
Joe Bob Says Check It Out!
(Update: it looks like the black hole talk is not online at livestream yet, as of 2009-12-15 13:40. However, I believe it will be before too long.)