Since the question was raised, here's a poll about which game we should use.

The advantages of each game are as such (as far as I can see, and they're pretty obvious):

[death]Neverwinter Nights:[/death]
• Everyone can run the game.
• Enormous amount of custom content to choose from. (To the point that it actually gets hard to sort out the best stuff.)
• Linux server.
• Bugs and quirks well worked out and documented.
• Several people in the community already have experience with the Aurora toolset.

[death]Neverwinter Nights 2:[/death]
• A lot better looking.
• Higher new player attraction value.
• More intimate and therefore RP-inspiring environments.
• According to promises (hard to verify at this point) a better scripting system and more dynamic scene creation in the toolset.
• Some new features, such as a world-map with destination choices and more NPCs in your party. (Not necessarily applicable.)
• More custom content forthcoming, though it will most likely take quite a while (as in at the very least a year) for it to reach NWN levels.