Instead of just a business card, we've put together a package that includes a resume with business cards. The template includes an A4 CV template with 2 business cards.
The free template is in PSD format which makes editing very easy. Of course the file is available in high resolution at 300 dpi and CMYK color model.
Thanks to Graphic Pup and Tamzid Hasan, who specializes in designing business cards, flyers, logos, brochures and other printed materials, for creating and sharing this work. Be sure to visit their sites to find other quality design resources.