I saw a couple of these guys on TV (O'Reilly, I think) not too long ago. According to them, these chips are already being marketed in Europe.
I seriously doubt that these are that "mark", but they are certainly a forerunner.
My guess is that these will have limited use for a while--I doubt they can hold enough information yet; and they certainly aren't secure....
As for selling them to companies, we have a very mobile workforce. The expense of having them implanted/removed (and the risk of possible lawsuits from infections, etc.) may make them cost prohibitive. I'm also curious to know how information would be added, deleted, and updated.
Between Christains being on guard for the mark of the beast, companies looking for ways to cut costs, and the greenies worrying about brain cancer from cell phones, I don't think they are going to find a big market in the immediate future.
Just my 2 cents :)
Shalom,
DrMike