Well, that's very interesting. I had exactly the same scenario as this last Friday. Perfect communication all week, including in the morning; she even stated that I would be receiving final address and phone details within half an hour of the meeting time. Ultimately, that didn't happen. Found her address (she had previously sent a post code to me) - not an easy task to an outsider - remained in 'her' car park for 20 minutes after the supposed start time, and nothing. Drove 75 minutes back home, then received a 'private number' phone call from her (lucky I was on my own at the time!), apologising profusely for not seeing me. Apparently her 'landlord had turned up suddenly'!!
Strangely enough, 2 FB's also 'turned up' that day on her AW profile!