Train and Subway Information Design
Metro style refers to boxing information so that it's easy to digest. Windows 8 uses this, although they failed to make it usable.
Metro Style on the Web
I like the navigation used for the ACM Digital Library Computing Classification System.
ACM: Mouse Hovering
When you hover inside a box, part of it turns green.
In Jakob Nielsen's Alertbox article, he says the lines surrounding a box are important. They signal where the user can click. In the ACM DL CSS example above, you can hover your mouse inside the box and the text won't turn green and clickable. You must hover closer to the text to make it clickable. Is there a reason for this? Is adding this feature to the design confusing some people, or somehow making the design better?
One possible explanation is that less hover effects distract the user less. I'd like to hear your perspective on this.