Electronic Business Cards (or EBCs) are new to Outlook 2007. EBCs are an extension of Contacts, and they allow you to easily share contact information with others. Although there's a course that you can take if you want to learn all the ins and outs, making your own Electronic Business Card is as easy as switching to Contacts and creating a contact for yourself.
Once you create a contact for yourself, you'll have an Electronic Business Card to use, which you can then include in your e-mail signature: Just click the Business Card button in the Signatures and Stationery dialog box as we've shown in the picture.
An EBC will add a professional touch to your signature. In addition, recipients can easily save your contact information to their own contacts, because an EBC has two parts: a picture and a file. The file, which is in vCard format (the Internet standard for sending and receiving contact information), means that the contact information associated with the card will be easy for recipients to save — even if those recipients aren't using Outlook 2007.
For more information about creating and using an Electronic Business Card with your signature, see Create and use your own Electronic Business Card.