1. Don't be an idiot
2. That's about it.. Put NSFW material behind LJ-cuts like a good responsible citizen, and otherwise, have fun..
Feel free to participate in the official community Picture Post, it's not mandatory, but it helps to see who you are.
There's an IRC channel for AMA - on the server irc.darkmyst.org, the channel is called #ama. If you're not sure how to get there, try mIRC, and read the instructions carefully. If all else fails, we have a Java app that will work for you, located here.
This community has 196 members and is watched by 163 people as of July 16, 2008.