[OCR, Barcode Reading, and UPC lookup]

There is a similiar app for webphones called ScanLife 2D, It scans a 2D barcode and links it to a product info, I think I've seen other apps that will do what you mentioned above as well, but I'd have to look again.

[Steganography]

First let me say, love the episodes.

The steganography piece got me to thinking how I could implement that in a web environment. I have several images that rotate in and out of a few webpages, i'd like to be able to attach the url text to the image file and then have a function of somesort pull that url text off the image and use it for the a href location. I know i can use a db and/or case statements, but using this alternate method would have no ties with any db. Has anyone done this or know how I should approach?