I remember Worlds Inc.. In case you guys were wondering if they even bothered creating something based off their patent, back in early '95, when I was still using Windows 3.1, I installed AlphaWorld and Worlds Chat, two 3D online worlds owned by Worlds Inc.. At that point in time, I thought it was the coolest thing ever.
I have no doubt that their patent is legit and they'll probably win the court case, but the way they decided to enforce their patent this late in the game is just downright foul. They should have come after MMOGs actively upon launch. I guess they used NCSoft as a testbed first to see if they have enough clout to take on Activision Blizzard.