I have one idea in my mind "an mobile app shows nearby money holders,
Oh boy,I wonder how easy you're making it for thugs to mug people.Or vica versa.
you deposit btc to your account and click on any money holder nearby, now he gets notification and your bitcoin goes to escrow (also he can see the). You will generate a QR code you have to share this code with him until he gives you cash, you can go to him to pickup or ask him to come at my place. Once you let him scan QR code from your mobile phone the btc goes to his account."[/i]
What if he takes a knife out and forces you to send the coins at the escrow ? In third world countries,I fear this the most.On a serious note,as mentioned above,localbitcoins did that ages ago.