Stack Overflow is the ultimate long-tail resource. My favorite example of this is, what I consider to be, a very obscure question I asked then answered about getting (http://stackoverflow.com/questions/570076/netbeans-forwarded...) anti-aliased fonts and sub-pixel rendering working when running java software on a remote X11 server. This sort of thing is incredibly esoteric, yet, close to 1,000 people have looked at it in the last year. When I asked the question, and found the answer, there was no useful information that I could find about it, yet when you search on google today for 'x11 java anti-alias' the first result is my question, and the second is someone elses.

We've come a long way since expertsexchange.