http://BoardReader.com specializes in searching and indexing message boards. This makes it much easier to search for a discussion a particular topic across all the forums on the web. One application is to search for a particular keywords when you have something to say about it. For example, Ayn Rand.
You could search for people talking about Ayn Rand, capitalism, or egoism, and invite them here - especially people on boards which are hostile to Objectivism.