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You can register using your Google, Facebook, or Twitter account, just click here.That, my friend is a hornets nest. You think plasma liners are a hoot, check this rascal out.What I see is an engine with an undersquare bore/stroke ratio, thus it will favor torque production rather than power. Use of the semi-hemispherical combustion chamber will improve surface/volume ratio and decrease heat loss through the chamber, increasing efficiency.
The cavities on the exhaust side look like a mix of coolant and oil return paths. We know from tech talk 31 that the holes around the combustion chamber in the head are the coolant entry lines for the head, so the two holes on the intake side are likely the oil feed for the heads.
Other than this there isn't much we can get from the raw casting we didn't already know. I see the timing cover isn't in the picture and I don't think I've ever seen it anywhere, so they might still be waiting on that.
Use of the two stage tapets as described in the Dreamcruze video will of course increase volumetric efficiency when it's needed, increasing output and thus decreasing specific fuel consumption (a bit deceiving as SFC is measured in g/kw-hr so increasing power output decrease SFC but not actual fuel consumption.)
The "valve cover" IS the cam retainer, apparently.