Mystery Meat Navigation

New style of popular navigation - "Saturnic Navigation," "Non-Intuitive Navigation" and, most recently, "Mystery Meat Navigation" - based on JavaScript rollovers.
MMN is confusing - to find and remember navigation options.
Real problem - MMN is very seductive, looks cool, and is used on a lot of sites that win design awards. Without long strings of text, MMN makes the page look "cleaner" because there's more white space.
Extreme example - road signs don't wait for you to get near them before they tell you what they say.

MMN hall of shame examples:
... Museum of Modern Art workspheres
... Microsoft Design Jobs