When you say "All of your business cards can go to either..." is that what you mean or do you mean "Each of your business cards can go to either..."?

I imagine there's a subset of each that should be moved from one to the other.

Also - with you mapping my social/business network as I create it I'd be concerned about your intended uses of the data you collect. Certainly you could have your own LinkedIn/Facebook style connection graph built pretty quickly. Then what?