The Fourth Street hotspot is part of a communal wireless project called Neighbornode, started by then New York University grad student John Geraci as a way to add a community-building aspect to the common practice of using a neighbor’s Wi-Fi network to get online. Anyone with a broadband connection can start a Neighbornode. When someone uses the node to access the Web, he is first directed to a home page with a message board, classified section and photo page to help locals recognize one another. Here’s how to do it in your hood’ Link.