Using tabbed menus

Jakob Nielsen's Alertbox, "Tabs, Used Right," gives tips on how to use tabs correctly. His premise is that you should only use tabs to present alternating views of similar information -- for example, stock market indices for North America, Europe and Asia. He points to Yahoo! Finance as an example.

Oddly, the Yahoo! Finance site also uses tabs "incorrectly" by Nielsen's standards, because the tabs across the top of the home page include drop-down menus, and each tab selection presents a different type of content -- news, personal finance, portfolio, etc -- and you can't select the tab itself.

Have you seen a good example of hybrid navigation that presents clear and consistent choices?