Yahoo! sues Xfire for patent infringement reports that the gaming messenger application Xfire is the subject of a Goliath versus David lawsuit filed by Yahoo! The article describes Yahoo!'s case for patent infringement, while suggesting that this may all be an overture towards buying Xfire (reminiscent of how young boys punch the girls they like). Former pro gamer Dennis "Thresh" Fong is one of the co-founders of Xfire.