I scanned a "more info" QR code once on a commercial building rental advertisement and was amused that the result was a direct link to a PDF file that had the floor plan of the building and nothing else.

I guess I should have been happy that at least it wasn't a link to Justinsomnia. ( http://justinsomnia.org/2011/03/why-does-that-qr-code-take-m... )

They are starting to show up on realtor for-sale signs. There's one I drive by on my way to/from work that scanned a while back. I landed on the realtor's page about the house (which, BTW, was way out of my price range).

My last attempt to scan one of those took me to the search page not optimized for iPhone/Android on the realtor's personal site... and no clue as to how to find the house I was standing next to.

I know that westsiderentals.com uses them for their signs here in LA. They have a QR code in addition to a way to use SMS to get information.

I see these all the time in Chicago. I think the only time I've ever scanned one was because I was curious as to the asking price of a house near me.