Skype - In Ubuntu, How to Make it Happen

Skype is proprietary software that allows you to make calls over the Internet using your computer. Skype uses decentralized peer-to-peer technologies, so your calls do not go through a central server, but through distributed servers and other users. It uses its own proprietary communication protocol to achieve this. In addition, all communications are encrypted from end to end so that others cannot listen in. The Skype software is free to use, but it is not free software; the source code is proprietary and not available for modification.

via Ubuntu Help

Was doing some reasearch on Skype Over Ubuntu and Came Across this site, that gives you a general idea and presents you with links to further information. I will have to explore Skype on my system to see how it goes and offer updates on that resource. This is a good starting point.