I have found Wiki with Captcha to be the most effective way to do these kinds of things.
We had a wiki already several times for ispconfig. If there is no wiki, everone wants one and says that they will fill it and if there is a wiki, nobody will enter anything. There is a wiki at wiki.ispconfig.org and many poeple got granted write access already an? its empty. If you like to get access, write me an email.