I scrolled up and down for about 15 seconds trying to figure out if this screenshot was supposed to be a concatenation of multiple Walls or if it was one long wall view (I think it's the latter):

http://behance.vo.llnwd.net/profiles14/398559/projects/65046...

That kind of visual confusion is a bad thing. I understand the desire to move away from lines and boxes within boxes. But elegant lines should not blur functionality.

Also, how would this design look when trying to accomodate the many kinds of statuses that do not have banner-size-worthy photos? My guess is not very well.