I'm not sure how I missed this the first time around, but CNN has an interview with Neil Gaiman and Joss Whedon that discusses their respective new (at the time) movies MirrorMask and Serenity. They spend considerable time talking about geek culture and its intersections (and occasional absorption by) the mainstream.
Here's an excerpt, where they talk about their fans self-identifying as geeks and nerds:
Neil Gaiman: I think the fan base is literate. You need to be reasonably bright to get the jokes and to really follow what's going on. That, by definition, is going to exclude a lot of people who will then get rather irritated at us for being pretentious and silly and putting in things they didn't quite get. But it's also going to mean that some of the people who do get the stuff will probably be fairly bright.