Hello there. I have a couple of answers and a suggestion for you. There IS a Warhammer MMORPG in the works. According to folks at MMORPGdotcom, the release date is sometime in the first quarter of 2008.

I don't know about NWN, but the others are strictly online play.

Finally, if I may make a suggestion.... City of Heroes. Very fun game(for me at least). The comic book superhero angle is a refreshing change from the same old Sword and Sorcery routine. It boasts the best player character customization ability BAR NONE in the entire MMORPG world. The game has two to three MAJOR additions each year for no extra charge. You can pick up the combined City of Heroes/City of Villains games for a song at Wally World. There is also no additional charge to play both games provided you enter them correctly into you master account.(don't worry... it's easy... just follow the instructions when you create the master account after installing the game)

Sorry for not providing links, but I'm new here and don't yet have the requisite 10 posts minimum to allow links.