At a time when social media revolutionize the exchange of information between users of the Web 2.0, many enterprises are still applying older collaboration paradigms. Following the explosion of blogs and social sharing services on the Internet, some companies are beginning to catch up with these trends, but not all employees are familiar with these new practices which require manual contribution, even though they became usual for Web 2.0 users. Inspired from previous works and currents trends in Social Networking and Context-Awareness, we propose the iterative development of an experimental framework for contextual sharing and filtering of social updates. The intension is to trigger more opportunities for communication in a collaborative environment, while preventing information overload. In this paper, we present some preliminary results on synthetizing contextual clouds reflecting current working activity of users, based on the extraction of descriptive tags from web documents that they are currently accessing.