The "new new thing" these days seems to be bar codes.  Specifically customizable, two dimensional bar codes called QR (Quick Response) Codes that can be scanned by cell phones that have cameras and the QR Code reader software installed.  I’d try to explain the concept, but since I barely understand it myself I’ll have to send you to a PDF that does have an explanation.

Ignorance has never slowed me down before so I won’t let it now.  I’m happy to unveil the official QR Code for http://www.jonlowder.com: