I would like to build a tabbed menu pretty similar to the profile management of StackOverflow.
tabbed menu StackOverflow http://img410.imageshack.us/img410/3037/image1nw
Another solution would be to create a custom route (Derive from RouteBase) that uses the querystring to select a different action. Each action would have a separate view that uses a master page containing the common content for the page.
Basically you'd have "UsersController" with actions "stats", "prefs", etc. All chosen by a custom route class that you've implemented.