Nothing, though I have stopped trying - otherwise I'd cross the line into 'omg this guy is a stalker' territory.
To sum up- called her on day to arrange booking - she sounded fine etc, got to the street a few hours later and called, on time. No answer. Tried again a few minutes later, no answer.
Sent a text when I was on my way home. And I think I called once or twice more over the next couple of days before writing the review. Again no answer, and no voicemail facility.
Now, on her profile it does say that no AW feedback means no meet, but she did ask me when I called if I had an AW profile and I said no, and she was still fine with the booking going ahead. (I've actually deleted my AW profile as I made the mistake of leaving someone negative feedback on AW.) But that means I'm not going to create a new profile just to send an email to her.
Now I remember her profile was active after the meet was meant to happen saying something about an emergency and not being able to get to her phone at the time. And that's just about understandable - but responding to a text shouldn't be a big deal or if she saw the missed calls from my number perhaps just sending a discreet text saying 'I was busy, free now, please call me back'.
All in all it was a good old waste of an afternoon.