sharing files?

[Mike]

I'm really not sure how to word what I'm think of. I'm searching for
some way to share files among team members using emacs. Sort of like
a wiki, but maybe more something that is a buffer that has a process
that looks once a minute or so to see if the file mtime has been
modified, then reloads the buffer. Something where we can all see
what's going on... maybe a running list of tasks, or a white-board,
or an in/out board, ...?

Yes, this is vague, can you help me fill out the idea?

Mike