Entirely useless? At least we'll know what works and what doesn't, and we won't have to search through hundreds of posts about stuff that may or may not be related to the issue.
I'm perfectly fine creating a wiki that says, 'This is how you do this quest, these are the possible side options, these are the bugs that you *may* encounter'. If leather armor spawns at 3-12 AC, then, let it be known that that's a possibility in the current patch level.
Ideally it's a website full of information, guides, topics, tables, and whatever the hell else to help other users be able to have more fun out of the game. This game might be in alpha stage right now, but soon it'll be in beta, and then release. It doesn't hurt to be ahead of the curve and build something useful that everyone can share information on.
I personally would like to contribute mostly about the editor, whenever that gets released. Because quite frankly, I don't think that Larian is going to include an 'instruction manual' on how to use it, and people will be wanting to make their own campaigns and such right off the bat. I think it would be really cool to write guides and things on the wiki so that others can make some really great stuff, without having to resort to unanswered forum posts.
