Fnisizers Forum looking for collaboration post..

The one thing that I have been searching for is a chat or place to have an ongoing story written by many people.  It seems that when I finally find any they have already ended or they have been going on for so long that you could never catch up.  I would love to find one that starts a new story every week or month, so that people new to the site could jump in.  Anyone know of someplace that has this??? if so please let me know.