To conclude this short overview of some main issues related to personalized IR, we want to mention a promising research direction which aims at exploiting the users’ social context to produce more effective results in Web Search [33,39]. This is made possible by recent applications and technologies related to the so called Social Web, aimed at making the user active in both content generation and sharing. In [33] an approach to collaborative Web Search has been recently proposed, which based on the search behavior of a community of like-minded users is aimed to adapt results of conventional search engines to the community preferences.