My problem with the podcast has always been the ending. I never know what your closing music sounds like because the last 5-10 minutes is always reviews of RPGs I'm never going to get to play (hell, I can't even get a D&D game together, let alone something more esoteric). But other than that, it's pretty good. I think a co-host in a color-commentator position might help you out with the whole feeling stiff thing (which is a vibe I got off the first podcast as well, but one that doesn't bother me much). An extra person might make it seem more like a conversation instead of a guy reading his blog instead of typing it. But try to get someone in person as skype just causes too many problems to be used on a regular basis like that, especially if you're doing an interview or round table where sound quality due to bandwidth is an issue.
The RPG thing is just where I'm starting from. Eventually I'll build up blocks of movies, music, that sort of thing, but hey, if you do RPG stuff more than movie stuff, it's what you're bound to talk about, and that's the case with me.
