I for one would like a consistent place to look for information. A forum is ok, but disorganized and often out of date, especially with such a rapidly changing game.
A wiki would be a great place for this information, and allow for such things as a player-updated map.
At the very least, one result of such a project would be to decrease the number of newbs like me asking (sometimes literally) "How I mine 4 fish?"
Or you could at least have one URL to respond to them with while using the well worn DF-pro phrase "read the wiki".