MyWall is a social media site created by two brothers, Jake and Francis Ziegler. They had a dream of an easy, adaptable way to stay in touch with their friends. After working and tweaking for over a year, they released it for their friends, and it took off. Their friends added other friends, those people added new people, and those added more until the vast majority of the world was connected via the MyWall interface.
You can post and share anything and everything, as long as it is not of an adult nature (children use this site, come on people). You can ad tags and connections to any post to be sure that the people you really want to know do, and you can follow any of the accounts so you always know when they post something new, tagged or not.