Over in the non-web world of comics, Spider-Man/Peter Parker's marriage to Mary Jane was not just ended, not just annulled, but written out of existance, out of history. The contuinity was retroactively changed, what is known as a RetCon. It's a particularly large, particularly egregious, and particularly clumsy example of a RetCon, but they happen a lot in comics, and over at WebSnark Eric explains RetCons from A-Z in one of the finest pieces of comics journalism I've ever read.