Followup on the Zebra Crossing barcode app - I realized I wanted a copy of the PDF version of the manual for my camera on my phone. I already had the URL, and the JetCet PDF beta for Android on the phone so I could read it once I got there. A quick googling found the Kaywa qr-code generator, I pasted the url into that, fired up the Barcode app, pointed the phonecam at the laptop screen, beep clicked "open as url", waited for the download, tap and there was the manual. Not quite as smooth as bluetooth, but relatively straightforward...