Site Setup Wizard is a WordPress plugin that allows extending wp-signup.php with additional features such as selecting site’s privacy, site type, plugins to be activated, etc. before creating a site.
It helps develop a workflow for students and faculty to for select different options while creating a site based on their user role. It also takes advantage of WPMU Plugins such as WPMU Multisite Privacy and WPMU Pretty Plugins to provide additional functionality. NYU uses this plugin to allow users to create sites based on specific categories/department names in the site address.