I see some potential for using this for content distribution via QR codes. Create a page, make a QR code sticker and you're now hosting a website on a wall.
Couple notes: I tested doing this on a fork, QR codes have a 3k upper limit (which is fine for some pages), and when using large amounts of data like this they switch to a large-payload format, which seems to be blocked by the iPhone camera.
Either they're blocking large-payload qr codes or by url length.