Wizards of the Coast has released their D&D rules supplement, Dungeon Master's Guide 2, as well as a paragon-level super-adventure, Revenge of the Giants.

From the official website:

A source of inspiration for Dungeon Masters of any level.

This core rulebook for the Dungeons & Dragons Roleplaying Game features advice and rules for Dungeon Masters of all levels of experience, with a particular focus on running adventures and campaigns in the paragon tier (levels 11–20). It includes advanced encounter-building tools (including traps and skill challenges), storytelling tips to bring your game to life, new monster frameworks to help you craft the perfect villain, example campaign arcs, a comprehensive look at skill challenges, and a detailed “home base” for paragon-tier adventurers—the interplanar city of Sigil.

Fee-Fie-Foe-FUN! Evil giants seek to avenge past defeats by ravaging the civilized lands, and the only thing standing in their way is a renowned band of heroes. This D&D super-adventure, designed for paragon-level characters, can be played as a stand-alone adventure or serve as the foundation of an entire D&D campaign.