An interesting picture has appeared then disappeared from Flickr.  This image shows four different 360 consoles perched on stands with an Elite on the right, what looks like two Pro consoles and the mystery gray box on the far left.  I guess we’ll have to wait and see what, if anything, this is all about until later tonight.

UPDATE: After looking closely at the image it does appear as though the lighting on the far left box might be a little off causing it to look darker.  And as Joystiq points out another picture at its original size shows the same boxes in the corner but three appear to be white.  The question remains then that if that is just a white box with bad side lighting why has the picture been removed?  Again, I guess we’ll find out tonight at the briefing.