barcodes & cell phones

I've been more than a little skeptical about cell phones being used to scan barcodes. I just don't see the usefullness of it beyond the gee-whiz geek factor. Besides, if it was such a great idea the market would have matured to the point where there'd be one or two dominent players by now.Well, I'm rethinking it all. For one, I don't think that there's any one implementation. In fact, it may