At the Mayflower Barcamp 2009 we (Martin, Daniel, Sebastian, Max, Sarah, Peter and Konstantin) started a new project named phpMyBirthday. The main goal of it is to give you a tool to manage the birthday dates of your friends.
To achieve this we first built a import for vcards so that you can easily import the data out of your email-client e.g. Thunderbird or Outlook.
The next steps will be the improvement of the frontend and the enrichment of features in the backend such as extended management of contact data and more import and export interfaces.