That's exactly what I do. I just listen to it in another tab and switch back, which is a rarity on this vidcast. I'm downloading the old one to listen to on my iPod later and I absolutely hate how they do not have dedicated feeds for their shows.
I watched the first couple minutes, and I am curious to watch the rest, but I just can't bring myself to watch videocasts, even for stuff I find interesting.
It's the same reason I just don't watch TV regularly, it's just too much dedicated time where you have to focus on just that one thing.
That's why I think podcasts will always be more popular, even when bandwidth / file size becomes a non-issue between video and audio distribution.
Maybe I'll listen to this one in the background and give it a chance, then I can always switch over to look at it if it's necessary.