Earlier this morning, Google critic and Nextag CEO Jeffrey Katz used an op-ed piece in the Wall Street Journal to accuse Google of behaving like a monopoly. Google quickly responded with a line-by-line criticism of Katz's arguments. I had a chance to talk to Katz about his piece a little while ago and while he argued that he wasn't so much interested in engaging in yet another back-and-forth argument with Google, we obviously did touch upon Google's reaction to his piece.