BTW I've done a bit of research about QR code [1].
One of the common practice in QR code is encoding vCard information [2]. This is just vCard ASCII data encoded straight in QR code (try [3] and decode the result in [4].)
Apps like [5] turns iPhone into QR code reader. This app for example supports bulk-export. So if we affix QR code into attendee stickers, a vendor with a booth can scan them and export them all into a CSV format.
I currently don't know how we print attendee names into stickers, but if I can stitch together some QR encoder and Excel spreadsheet or something, the whole thing should be manageable.
[1] http://en.wikipedia.org/wiki/QR_code [2] http://en.wikipedia.org/wiki/VCard [3] http://yeblon.com/vcard-on-business-card-with-qr-code [4] http://blog.qr4.nl/Online-QR-Code_Decoder.aspx [5] https://itunes.apple.com/gb/app/qr-reader-for-iphone/id368494609?mt=8 -- Kohsuke Kawaguchi http://kohsuke.org/
