Facebook, Twitter, MySpace represent the most successful social networks and are enjoying their glory days. They allow their users to manage their social contacts in a very simple way, be informed of news from friends and meet new people.

Facebook, for example, totally satisfies these needs, monitoring your friends’ updates, with a feed reader, or with customized applications.

Today Social networks focus on improving the services their softwares offer users to allow them to track their activities, those of their friends and maintain social contact.

It is fair to say that the present system satisfies one of the main requirements of an online user: social communication and possibility to create a virtual network of