I'm thinking about marketing and advertising in the context of social experiences a lot these days. Primarily because we are launching a large research initiative on Monday to study current attitudes, techniques and best practices for marketing to online communities from both the community host and the marketer's perspectives. (if you want in, please let me know).
This is a really great overview and discussion of the state of online advertising in / to communities from the guys at Clue Implementation Unit (a.k.a Jake, Lee and Chris).
Podcast and show notes here.