The patent was granted May 4th 2004 per the actual patent. Reading the patent, I would think that suing Second Life would be a better match than suing MMO games. The patent refers to shared experiences and browsing. The website for the company, worlds.com, claims they launched in 1994, which predates most, if not all, MMOs. IANAL but, like others have noted, if MMOs can be sued by this patent, then all games that are not strictly single player offline games can be sued as well.