The challenges of managing corporations at a time of web 2.0 and social media. What are the main shifts companies, management and businesses are facing from their internal to the external in this new technological and social paradigms. The individual and companies as media. The paper of intra-nets and good communications. A social media SWOT analysis. Correlation between web 2.0 and social media to engage employees and to get ROI and ROA. Listening, engaging and clear communication and guidelines start in your intranet, inside your company. Any efficient strategy always starts from the inside to the external. CONSUMERS, PROSUMERS AND NICHE GROUPS ARE THE NEW STAKEHOLDERS OF COMMUNICATIONS and business.