eHow.com - Crowdsourced "How to Do Just About Everything"
Fascinating example of a crowdsource powered business - the secret is, volume, and yet unlike many crowdsourcing initiatives, the sources make money from their contributions, as does eHow as a business, by selling advertising surrounding the content (text and/or video).
tags: crowdsourcing, 2.0, writing, SEO, search, search_engine_optimization