cell phones in the library 2

(img source: http://semacode.org/images/bit-banner.jpg)

I like this application:
http://semacode.org/

Imagine strolling up to the end of a shelving unit, clicking a quick pic of the 2-d barcode afixed to it, and accessing a website rich with faculty notes, a syllabus, a message-board for your class, perma-links to database searches dealing with the subject/project you need, and maybe even a wiki. Or in a public library -- you're connected to a site with local events related to the subject (say, a drumming circle, or a writer's group) like Meetup.com, suggestions for further reading, and news stories.

This has potential. Cell phone optical applications as a vehicle for content delivery TO cell phones or computers...