Difficult to comment without more detail but this looks kind of in line with work being done at Sussex University:
http://blogs.sussex.ac.uk/elearningteam/
this post in particular:
It would be worth soliciting their opinion and finding out what else they maybe working on.
personally i think a stand alone wall is of limited value if that is what you had in mind?
it would be nice to have expandable content areas like those shown above to make it more flexible / useful.
another idea would be to create a block capable of linking out to activities. The scroll of death should fit in the sidebar with judicious naming of activities :p
that way you could make the wall the central focus of the course, mix in other forms of content (video, images etc) in the main content area and still have full access to activities if you needed them.