The New Jersey Digital Newspaper Project has just created a project resources page that has an abundance of useful information about the state project as well as a number of additional resources (including a map and downloadable directory of all New Jersey online newspapers, both free and subscription). The resources can be used to inform yourself about New Jersey newspapers, both online and otherwise.
If you are interested in New jersey historical newspapers, I would encourage you to visit the State Library's New Jersey Digitized Historic Newspapers resources page.