It's so cluttered, it's giving me anxiety just looking at those photos. I keep a fairly clean desk, I don't think I could function well in that environment...
Could you? I'm thinking michaelbuckbee[1] is right about the flair thing. I would bet that if you keep a clean, organized desk with no decoration you would get asked about your feeling working there and maybe not be seen as Zappos material.
I'm not sure who's working PR as Zappos but that picture[2] cballard[3] linked to is probably not a good corporate message given the sign in the upper left corner.
Many years ago I worked for a stint at ebay and I was definitely considered a pariah for not flaring out my desk with juvenile toys. I did that in Grade 9 with my locker