create shared directory

[Paul William <maillist@bestworldweb.homelinux.com>]

Hi all,

I would like to create a a directory that all users on the system can 
read and write to. I could just chmod 777 a directory but I want every 
user to be able to read and write to every file create by every user ... 
How can I do this? I am running debian unstable.

Thanks

Paul