That pile of trash in that lot that frustrates you? That old graffitied-building across the street from your house? Those sidewalk weeds that have grown knee-high? Well, Saturday is the official day for neighbors to band together to clean it all up. The third annual Philly Spring Cleanup kicks off tomorrow morning with the mayor, broom in hand, outside his alma mater St. Joseph’s Preparatory School in North Philadelphia. Nutter will be joined by city staffers and former actor turned Northeast High School teacher Tony Danza. There will be 200 cleanup projects throughout the city. The major theme: "Keep Up The Sweep Up," to keep the clean-up effort going for more than a day. Here’s hoping.