Wouldn't it be nice to have a page with just the answer (and maybe the questions) for some topics.
The fact that there has been an extensive discussion about a question isn't always relevant to someone who wants to just learn about the topic. For questions that are quite general. E.g. "What are generics?" a wiki page that has a complete answer without all the fluff of the comments and "wrong" answers would be nice. Links could then be put in these pages to refer to other wiki pages. Hey, I hear you saying "Why don't you just use Wikipedia?" well maybe Wikipedia should use SO. I mean SO is a lot easier to work with than Wikipedia so why not add more Wiki-style features to it. I just think the navigation around SO is not quite up to scratch. If I go to a question about generics there should be a link in the answer to a question about inheritance etc. much like Wikipedia allows for easy navigation around the "knowledge tree" if you will.
The problem with tags is that they give a whole bunch of specific questions instead of one with a general introduction/tutorial on the topic. For example I think there should be an equivalent of this page on SO.