They could add the CueCat to their list. I seem to remember that Wired got all excited about it at the time.
http://zteo.com/posts/sunday-hacking-cuecat-delicious-librar...
I never thought it would go anywhere because who would buy hardware just for that? But I did kinda admire that they tried.
One of those 'oh man great idea ... oh no I don't think it will ever work' kinda situations.
It was very much a fun early mass consumer days of the internet kinda shot in the dark / fun to me.
I think they gave away the readers for free. I had one at one point, and I certainly wouldn't have paid a penny for it. I think they were also the basis for quite a few barcode-based hobbyist projects at the time.