Here’s the story from scifi.com: SCI FI Wire:
Diamond Age, based on Neal Stephenson’s best-selling novel The Diamond Age: Or a Young Lady’s Illustrated Primer, is a six-hour miniseries from Clooney and fellow executive producer Grant Heslov of Smokehouse Productions.
When a prominent member of society concludes that the futuristic civilization in which he lives is stifling creativity, he commissions an interactive book for his daughter that serves as a guide through a surreal alternate world. Stephenson will adapt his novel for the miniseries, the first time the Hugo and Nebula award winner has written for TV.
The thing to capture is the variety of cultures in the world of the book. I’m quite stunned to see Stephenson himself doing the writing for the screen. And pleased.