Of course one of the best times to be had with NWN is in multiplayer games.There are still some great servers out there, generally reffered to as Persistent World servers or PWs.
One of the best parts of this game is in the toolset and the DM client.
They cater to all sorts of playstyles from general hack n slash, tp pvp to Dungeons and Dragonms style rp.
One of my favorites over the years has been the World of Avlis which can be found here
http://www.avlis.org/portal.php Also a very good source for multiplayer gaming can be found at
http://www.neverwinterconnections.com/
They have a very good and helpful community. They mostly cater to dnd style scheduled games that involve a small party of players and a dm, although their forum does have a section for announcements oif PWs as well.
Great resource for players, folks interested in learning about dming multiplyer NWN games and for builders as well.
Another great resource for the community over the years is the Neverwinter Nights Podcast. Some very informative and entertaining shows can be found there.This year the folks running it took a break but they are planning on starting up again with new shows soon.
The original website can still be found right here
http://www.neverwinternightspodcast.com/
But they are in the process of moving to a facebook page
http://www.facebook.com/pages/Neverwinter-Nights-Podcast/70648882178?ref=nf