A month or so ago someone mentioned to me that you can create a weblinked barcode that is scanable by a mobile phone. I have created one at
Mobile Barcode Link Generator and have pasted it here to see if it works.
This one below goes to my artist website. My husband tested it out with the free iPhone QR code reader app NeoReader :
http://news.cnet.com/qr-code-readers-for-iphone and it worked fine. I would love to put QR codes on each of the
Slot Shelter cards and have each QR code link to a webpage with info and video explaining the content behind the card design.

I am stewing on idea on how to integrate this technique into art installations that have both physical and web based components.
Below is a barcode I will be using in fliers for stores and telephone poles explaining a street banner project. This code links to the project site:

Along the same thread of thought on barcodes, a year ago I was exploring and found this site:
http://www.barcode-plantage.com/index.htm which creates beautiful graphical displays about product manufacturing from info on barcode.