This document discusses trends related to Web 2.0 and online communities. It notes that Web 2.0 emphasizes user-generated content and social networking. Some key trends it outlines include the rise of blogs, social networking sites like Myspace, user-tagging on sites like Flickr and Delicious, the growth of online video through YouTube, and virtual communities like Second Life. It provides examples of how various brands are leveraging these new online platforms and trends to engage with customers.