Over the last week or so, I've made several short [[http://www.yioop.com/?c=group&group_id=20&arg=read&a=wiki&page_name=Main|video tutorials on how to use Yioop]]. In particular, this video explains [[http://www.yioop.com/?c=group&a=wiki&group_id=20&arg=media&page_id=26&n=06%20Using%20Yioop%20Groups,%20Discussion,%20Wikis.mp4|how to join or create your discussion group on Yioop]].