Bokode
 

This looks interesting as a replacement for the barcode. What isn't mentioned, however, is the cost. Will we still want this by the time it's cheap enough to be used unversally? Or will we be all big-brothered out?

http://news.bbc.co.uk/2/hi/technology/8170027.stm?ls

This was interesting. So were the other clips on the website. Cheers.