From Search Engine Watch
Google has added a keyword based browsing feature to its toolbar, allowing users to type words rather than URLs into the
Internet Explorer address bar and automatically see the “most relevant” site for those terms.
By default, words typed into the Internet Explorer address bar trigger an MSN search, just as if the words were entered into an MSN search box. The new Google toolbar feature bypasses that functionality.
When there is more than one relevant website for a particular word or phrase, the user is presented with a list of Google search results to choose from.
Google has no plans to sell particular keywords, relying instead on its own algorithmic technology to determine the best matches between search terms and specific URLs.