A little back story: One of our alpha user complained about this so much that we decided to delay our schedule to re-write CardMunch. We spent bulk of that time re-writing, and replicating the entire Apple address book framework.
What that enabled us to do is to create a completely separate address book from your personal address book. All of your business cards can go to either address books, and to switch between the two, it's just flip of a button. You won't have to worry about random business contact popping up in your personal address book.
I know it sounds a bit salesy, but the feature is really awesome. I'm glad we decided to implement it. I have about 800 contacts in my CardMunch address book for testing purposes, I would hate to put these in my personal address book.
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?
I think we're all spooked by the facebook fiascos lately. But if we all take a step back, businesses similar to CardMunch have existed for years, just check out CloudContact, CardScan, Shoeboxed...
Here's a test you can do: tell your stories to 5 people who agree to listen for 20 minutes, and have a friend make notes on which stories/angles these people seem to find interesting. Then focus your story on these interesting stories.
Also: rewrite them a few times. You can usertest your stories.
Also: if you can place yourself within a bigger story, that's perfect for the press. Keep an eye out for bigger stories you might fit in.