Hacker News Reader

I think any place wheelchair-accessible is robot-accessible, and that's a standard we should be working towards. As for navigation, it needn't be too tricky. Something as simple as putting up navigational QR codes would help a lot.

The ambitiousness of this proposal seems on the same order of magnitude as existing infrastructure projects such as creating a city-wide electric railroad network or significantly upgrading a city's road/water/power grid.

Stick QR codes to everything? Or QR codes only visible in IR, so as to be less annoying?

If it's not necessary to be human visable/readble, you could also embed RFID tags in walls / the street.