If you were considering to join a small online community which format would you find most appealing?
Mailing List. (All members pre-approved. No html, photos would be downloads which may be blocked depending on email settings. Email delivery.)
Multi-author blog. (Allows pre-approved people to author posts. Otherwise viewable by anyone. RSS feed or manual checking.)
Forum/BBS. (All members pre-approved. HTML formating and image posting built in. Manual checking for updates.)
Other - please mention in comments.