When you don't want Google content cluttering up your search results, the Google minus Google custom search engine cuts out pages from Knol, Blogger, and YouTube. [via]

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Google's recently launched Wikipedia competitor Knol has just updated its search functionality (yeah, you'd think that's one area Google would have covered off right from the start). While the full set of Google keywords isn't yet supported, you can now do searches for exact phrases and OR options, select which parts of a given article to search through, and sort results on a variety of parameters. [Knol via Google Operating System]

Following a restricted beta which began last December, Google has made its Wikipedia competitor Knol open for general use. While Knol borrows the general concept of "anyone can contribute" common to most wiki projects, it has a slight twist, as Google's software engineers explain:

With Knol, we are introducing a new method for authors to work together that we call "moderated collaboration." With this feature, any reader can make suggested edits to a knol which the author may then choose to accept, reject, or modify before these contributions become visible to the public. This allows authors to accept suggestions from everyone in the world while remaining in control of their content. After all, their name is associated with it!