Really nicely done! I like how entities, concepts, etc. are color hilited in the original input text, and the Wikipedia links with thumb nail images shown in the results.<p>I have something similar that I have been working on for years as a side project: <a href="http://kbsportal.com/" rel="nofollow">http://kbsportal.com/</a> I also resolve entities to DBPedia URIs.