Why?
Well you can embedded your contact details into a 3d bar code. A user can point their smart phone at the bar code and with the right software they can quickly added your contact details to their phone.
This has been added to http://rawsonstheflorist.blogspot.com/
http://www.qrvcards.com/ has a simples' web site that allows you to create this bar code within 5 minuteness and you then upload the image to your site.
