You may want to try playing the game online - NWN was designed from the beginning for multiplayer - and that is where it really shines.
Check out the Blades of the Banshee forum for information about Argyle - a persistent world that some of us play.
Also check out
www.nwvault.com - this site collects and rates the thousands of user created modules - a few of which are much better than the main NWN campaign IMHO.
