I'm currently working on a web application and the powers above have decided that overriding the browser's right-click menu with our own application-specific one is the way to go.
I totally disagree. I feel that when someone is using a web browser they have certain expectations about what should happen when they use the right-click functionality of a pointing device, and violating these expectations by purposefully supplanting this functionality is very disconcerting (annoying?) to the user.
What do you think? Have you ever seen right-click done well in a web app? I mean in a way that you actually thought, "Yes, this right-click functionality was a great decision."?