This is a place where I plan to keep stuff related to developing Web Apps with Opera Unite →.
I am not authoritative or definitive source for Opera Unite. I'm just a guy learning this technology.
Opera Unite is a web server embedded into Opera browser that can run JavaScript "server-side". Basically: when you run browser - you also run a website/web server (called "application") that other people can access. You can access your own application (site) too. It gives you unique URL, like http://computer.login.operaunite.com/application that anybody from any browser can access. It works behind NAT (1 external IP for many users), firewalls and routers. ("Applications" were previously known as "Services")