Three key points about the document: 1. The search market is dominated by three major players, requiring huge investments of $300M or more in capital, people, and infrastructure to become a serious competitor. 2. Search provides a very profitable business model with monopoly-like margins and half the world's online advertising expected to flow through Google by 2009. 3. The Yahoo! BOSS API provides access to Yahoo's search indexes through a web services model, allowing developers to build customized search products and experiences while paying usage fees or sharing revenue from Yahoo ads.