Microsoft has released a game that I'm sure it's using the logs from to improve it's Bing Search Engine.  The game's called Page Hunt and it consists of trying to use Bing to find a displayed web page using search terms.  If the results of your search contain the web address in the top five hits then you win and get presented with the next web page.  Interesting concept in that it essentially mimics what you do in real life to try and find a specific site.  We've all learned how to google Bing so turning it into a game felt natural when I tried it out. 

Interesting take on improving search.  Combine that with the Yahoo announcement this morning and Microsoft seems to be making a serious push to become the competitor to Google in the search market.