I may be getting over-excited about this but here is the ink:

http://news.sel.sony.com/en/image_library
/consumer/digital_imaging/digital_cameras
/dslr/detail?asset_id=30326

The thing is that the vertical grip is identical to the one shown on the "flagship". It looks a bit like the a700 but that's shown separately on the Sony images site.

You will need to join up the URL I couldn't post it in one go, I think there is a restriction on its length and I'm going to be told off by the mods