See the following sections for information about how to integrate Skype and Facebook features into your SharePoint site.
SharePoint 2010 also includes many social features:
This site includes code for most of the social networking sites:
Create a column that associates with Skype protocol (for SharePoint 2007):
This is a Facebook kit for SharePoint, where you need to create a visual webpart and use it:
Facebook SDK to integrate a project on SharePoint:
This information originally came from this TechNet Forum thread:
Facebook & Skype on Sharepoint
The primary contributors are
Andre Lage (Microsoft Partner and MVP) and
Bharath Ch (Microsoft Partner).