Not yet, though I have a Leica M pinhole body cap I could use via adapter. Using the same cap on a film body some years ago was fairly unsatisfying. IMO "full frame" isn't full enough to create a distinctive pinhole look. A 6x6cm frame is better, and a sheet of 4x5" film better still.
But I guess I'll give it a go on the Sony and see what happens.
-Dave-