On top of Boston's downtown announcement yesterday, the city will light up a square mile in Roxbury: This second project will offer free Wi-Fi to a total of 5,000 households across Grove Hall and Dudley Square, which are in Roxbury. This is a pilot effort, led by Pam Reeve, who is heading up efforts to find funding for a nonprofit organization that will build the city's Wi-Fi infrastructure, based on a task force report suggesting a nonprofit wholesale operator. Four companies are donating service and equipment for this test: BelAir (equipment), Charys (installation, operation), Gigabeam (backhaul equipment), and MetroNext (backhaul connection).