The good folks at Google Custom Search, in cooperation with experienced Wikipedian Mathias Schindler, have developed a “Google Custom Search skin” for Wikipedia that can be activated by following these instructions. In addition to using Google to search for Wikipedia articles, it makes it possible to search linked Wikipedia articles, as well as the content of linked external websites, using a simple tabbed interface. See the post at the Google Blog for more information.
This is a community initiative, not an official new feature developed by the Wikimedia Foundation, so we make no guarantees of any kind for its operation. It does show how much bottom-up innovation is possible thanks to Wikimedia’s open APIs and scripting interfaces. We’re very happy that Google has built this alternative new way to search Wikipedia. Please provide feedback below, or to the Google Custom Search team here.
Deputy Director, Wikimedia Foundation