Embracing a more open source philosophy, after their Hadoop roll out, Yahoo has also announced that they will be opening their search results.

Whilst as several people have pointed out, this is similar to Google's Subscribed Links it won't necessarily require people to explicitly sign up - some of them will show to normal searchers.

After the continuing furore over the Microsoft Bid for Yahoo it is an interesting slant that this openness of content would make the search more interesting, using the power of user-generated content, which is very un Microsoft! Wikia Search is one response to this trend and follows on from previous user-generated content successes like Wikipedia and Open Directory - albeit that both have their problems with the open nature.

We will be watching how this develops with great interest!