I would like to set up a simple forum for a small number of users. The features I would like are the following, in order of priority:
- logging on not compulsory for posting.
- A single thread. All the messages are immediately visible - no need to "open" them.
- most recent message at the top by default.
- The ability to upload photos.
Chatango is the closest thing I've found so far, but its a little bit buggy and the maximum message size is rather restricted.