On Monday, Montreal's hapless, shaky, angry, and white-haired mayor, Gérald Tremblay, resigned in disgrace. It's no big surprise, really. Gérald had been fighting corruption allegations for years, always claiming that he knew nothing about any corruption seeping into Montreal's municipal politics. Even the most casual city observer would call utter bullshit on that. The mayor's position really became untenable last week when a former top aide, Martin Dumont, dished the goods in front of the Charbonneau Commission, which has been overturning dirty rocks to uncover the filthy world of Montreal's construction contracts.