The world chico.. and everything in it...
Not yet.. But you can get some ideas from AngularJS branch https://github.com/gae-init/gae-init/pull/525
Or you can simply do it within couple of minutes using gae-init-magic.
Here is the result: https://notetaking-app.appspot.com/
So here is the free and open source app for keeping this kind of notes: Meet Notes :)
We should make an app for that! Note-taking app for people you just meet :) Free and open source..