I'm surprised no one mentioned YouTube Marketing. I had an older Microsoft LifeCam 3000, but when I had the opportunity to get an upgraded model 5000 for free the other day, I jumped on it. The difference amazed me, so much clearer with automatic focus and much less demanding for lighting requirements. I sit in front of it and talk, so the follow features are not a priority, I have an HD Flip cam if I need that. It does have special effects, but I have never tried them.
I just started introducing my video with the webcam, then transitioning to my desktop and back to the webcam to summarize and say goodbye. I think the effect is much more personal that way. I have had amazing success with YouTube and now it's so simple to shoot a video with my webcam it should be even better.