Contact Card in Outlook 2010 provides you quicker access to information about people who email you as well about your co-workers inside your Inbox. "In contact card, just mouse over the name at the top of the message and you see basic information:
Expanding hover card reveals full details, and clicking "Organization tab," allows you to see people in the organizational structure if your organization uses Exchange and Active Directory. Still wanting to know more, clicking the name in contact card open SharePoint My Site, an internal Website:
Perhaps even more useful is that contact card enables you to contact people quickly from Outlook:
"In today's workplace we often need to move seamlessly between communication modalities like email, IM, and phone. When you combine Outlook 2010 with IM and voice client that uses Microsoft Office 2010 Presence Integration API for seamless integration you can always choose "right way to communicate". Next time an email conversation drags on over an endless argument try switching to "real-time communication". With Office Communicator you can have video call or share your screen so other people see what you see," explains Microsoft.