The white square may have been photoshopped on to keep us from guessing something - that, or it's an odd port cover of some sort. They do also look to be using the THX color standard for multi-channel input and output (and they look to have gone to a 7.1 analog input rather than the 5.1 that the 950 has). The odd thing next to the coaxial out is either some sort of BNC connection (which would make sense for a component input if there were three of them) or a ground connection point - like maybe there's a phono input tucked in there. That would make sense, since they were developing one anyway for the RR2150. - I think everybody's going to be limited to some serious guesswork until we get a more hi-res picture or some direct information.