Call us crazy, but the concept of virtual worlds has been around for decades. Our kindred at WoW Insider point out, and we're inclined to agree, that there are many examples of prior art that essentially invalidate the patent anyway. WoW Insider cites the term 'cyberspace' as coined by William Gibson and used in his 1984 novel Neuromancer. One might even argue that the internet itself qualifies.
On top of that, NCsoft itself has yet to be served with notice of the suit. We're not legal experts, but we'd say Blizzard and the creators of, oh, every other MMO are safe. If Worlds.com is eager to find another genre to sue, allow us to suggest first-person shooters. There are lots of people playing those online too.
[Via WoW Insider]