Dave, I really liked it. Having said that I'm going to move into the helpful (hopefully) nitpicks.
The audio has been brought up. It makes sense for the voice to be mono, but it needs to be in both channels.
Your voice was really loud during the intro, probably in the red. This causes some loss of quality. Keep it in the green, man.
In your thanks section at the end you thank your father-in-law (I think) twice. Sounds like you recorded it more than once and kept the two best recordings.
All in all a super first podcast. Most of the first eps I've heard were just horrible. I don't think there's anything that won't shake out with experience.
Played it for my kids this morning, but they're too young for this. They didn't get the setting or anything. Superheroes are just on underwear and t-shirts to them. They have no idea about Comic conventions or anything of the sort. I, however, am old enough to get it.