This news is a few weeks old but I was pleasantly surprised to hear that a Firefox add-on, built by a team called kekeke, was the winner of the 2008 Yahoo! Kimo (Taiwan) Open Hack Day. If anyone has any more information about the team who won, or the add-on that was developed, please leave a comment.
The winners, kekeke, wrote a Firefox extension which allows users to select any keyword on any website and receive a summary of several Yahoo API search results (Flickr, Map, Knowlege Plus, and Lifestyle), without opening a new browser window. More relevant results will display in a stronger colour and users can save for later, or share results with friends.
Here is his blog post about this but in traditional Chinese. Didn’t find out any installation url, but they provide a demo video.
http://www.javaworld.com.tw/roller/ingramchen/