Web 2.0 involves user-generated content and participation on platforms like Wikipedia, rather than traditional top-down websites. The European Union's "demos" includes grassroots participation feeding into Brussels institutions. Charts show expanding social networks like Facebook and unique visitors to websites from 2008-2009. The document provides tips for individuals and organizations to link into relevant networks, establish an online presence and presence, and weave their issues into the blogosphere and social media to engage wider communities.