They've announced a new alpha-mount adaptor alongside this. Bit chunky, but it adds phase-detect AF as well as enabling access to all the Sony Alpha and Minolta AF lenses. Bit pricey though.|
I'm a little suspicious about the controls. That right hand dial doesn't seem to be easy to reach to me. And the fact they haven't revealed how they will work in modes other than Manual yet.
About halfway down this page: http://dpreview.com/news/1108/11082419sonynex7overview.asp
Looks pretty sensible to me.
So it looks like a standard two-dial setup plus a dedicated ISO dial, at least in the default settings. I guess if it's the right hand dial that's used for ISO that'll be fine, although I can't see in that preview which dial is 1, 2 and 3.
Cubby didn't know how to turn off sigs!