My reasons for opposing are simple: in-character discussion should be occurring in-game; and if people can't meet up in-game, they can use PMs to coordinate.  I've always felt that to do otherwise was a form of metagaming - and often exposed other players to things that they would not reasonably be involved in, if it were strictly in-character interaction.

 For in-game world news and info, hints to upcoming activities, etc it's been my preference to publish them to the main web site itself, in the form of news-like current event articles; or lore articles.   It seems to me that this is easier for the player than having to search through forum posts, determining what replies are relevant, what is "fan faction", etc. 

However, there's no arguing with the fact that players do seem drawn to the forum-based structure.  I'd like to hear your thoughts on the subject either in the context of your experiences playing on NWN1 and NWN2 PWs; or simply in terms of what you'd like to see in an active PW.    As with all of these discussion spotlights, there's no one right or wrong answer, so don't hesitate to speak up.