A small design firm by the name of Bing! Information Design has filed a lawsuit against Microsoft for naming its search engine Bing.
Ars Technica: A small St. Louis company is suing Microsoft for using the name "Bing" without permission for its recently launched search engine. Bing! Information Design LLC v. Microsoft Corporation was filed on December 16, 2009 in the Circuit Court of the City of St. Louis and alleges "trademark infringement, unfair competition, and tortious interference with business expectancy." The small company claims it has been using the Bing name since 2000 and has applications pending to register the trademark, while Microsoft only launched Bing in May 2009.