nVidia has posted a sample chapter of GPU Gems, Skin in the 'Dawn' Demo. The Preface and Contributor Biographies have also been released. GPU Gems: Programming Techniques, Tips, and Tricks for Real-Time Graphics will be available at GDC 2004. GPU Gems will be in hard cover, 816 pages, and in full color throughout, with over 300 diagrams and screenshots. It will be available at GDC 2004 with a suggested retail price of $59.99. The sample chapters in pdf format can be found here.