Google giving away free 25,000 business cards in the US only, to promote the public profile pages. Google uses iPrint's technology to print the business cards and the cards should arrive within 10-12 days. Google's business cards are less conventional, since they only include a search box pre-filled with your name and a link to your profile page. If you have a public profile that's searchable, Google will include it at the bottom of the search results page for your name.

Source:→ Google OS