The Wall is a stream of information submitted by the group members. You can think of it as the equivalent of a FaceBook Wall for the group. In order to post something to the wall, you must have a valid account on this site, and be logged in. To create an account, click on the Register link above. To Login, click on the Login link.
Once you've logged in, you will see an input area above the stream, enter whatever you'd like to share with the group. Comment on other wall posts, or simply "like" them to indicate your agreement. You can post pictures, links or just text, basically anything you'd like to share with the group. You are limited to 250 characters for a post ( making us almost twice as good as Twitter :) )