In a different forum, where I am a moderator, I did a huge FAQ archive thread for things that came up over and over again. I simply made a locked sticky where nobody could post. It contained links out to the various relevant threads. It was easy to manage as you were just collating information and not really creating it. As time moves on, as the topic du jour changes, you just eliminate the old thread and add a new one into the sticky.
It works fine, and requires minimal effort.
