Here are a couple of good business cards news stories from entrepreneur.com:

Creating a Great Business Card
Entrepreneur - USA
Success is in the cards when you’ve got business cards that convey the right message. … There are four primary considerations when ordering business cards: …

A business card is an integral part of any good marketing plan. For its size and cost, it’s probably the most powerful part. Of course, you can’t expect your business card to tell the whole story about your company. What you should expect it to do is present a professional image people will remember. A business card can…
< http://www.entrepreneur.com/marketing/marketingbasics/marketingmaterials/article71900.html>

How to Work a Trade Show
Entrepreneur - USA
… For about $500, you can get 5,000 postcards made by 1-800-POSTCARDS.
Bring three times as many business cards as you think you will need. …
< http://www.entrepreneur.com/marketing/marketingbasics/tradeshows/article44420.html>