I would prefer a wall for each user to make it more personal. I thought this was already a “public wall” meaning everyone can see and add content. That may get a bit over whelming if you have a few thousand posts per day!!!
my suggestion: it Would be great to have a “toggle option” to filter a public wall to view posts made by those you follow of for those following you. That way you can quickly see relevant threads from you friends!!
ALSO an elegant/ minimal design for social sharing is a must:)
And would also see the front end editor (that members use to post content) get a new face lift.