I like what this page does:
] is a good page too, obviously. Same as this: [www.culteducation.com
You could make a web site in which you talk about what you learned about the group. Such a web site can help people who are starting to think on their own and starting to look around, and it's something that can always be there for them to return to later. The free hosting on www.geocities.com is a great spot for that.
There aren't many message boards around, but there's reasons for that. Message boards can be abused pretty harshly by malicious people and idiots. Rick has to keep a close eye on this thing, I'm sure.
www.factnet.org has a message board but it's a little crazy, and they try to publish your IP address for each of your posts, which isn't good for former members who may be scared. But it's still a big, busy board.