Deeper in the maze-like layout is a windowless detention center, its walls covered in dingy granite tile and smelling of mildew.

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You enter through a revolving door, go down a long gangplank into the center of the sunken dining room--a chrome-and-tile diner that could have been imagined by Frank Lloyd Wright.

FORBES: Fact and Comment

That means that for more important apps, dynamic content can be front and center in larger tiles, while less important apps or utilities can be kept to the smallest-sized tile.

ENGADGET: Windows Phone 7.8 hands-on: cosmetically yours Hands-on