[Boy this is stale; almost everybody knows about this by now:] Google now has 20 years of Usenet online, and has compiled a list of first mentions. Such as the first mention of Star Wars Episode 6 (Revenge of the--er, Return of the Jedi), by none other than Randall Schwartz: "I wish Lucas & Co. would get the thing going a little faster. I can't really imagine waiting until 1997 to see all nine parts of the Star Wars series."