Selfregister for web login, set avatar image, use that avatar in other apps, edit profile, password reset process, multilanguage, customizable.
The documentation says that you should launch http://hostname.of.server/path-to-application.nsf/registration.xsp for a first test. This will give you a 404 error because registration.xsp does not exist. Use http://hostname.of.server/path-to-application.nsf or http://hostname.of.server/path-to-application.nsf/register.xsp instead.