Welcome to this overview of Blender 2.64 and all the new features and enhancements this update brings!
This Blender release is an incredible one. It has a emphasis on VFX tools, as needed and developed during Project Mango. In Blender 2.64 we are given brand new masking tools, better green screen keying nodes, greatly improved motion tracking with support for planar tracking and tripod shots. There’s a full color management system to get perfect color, and many improvements to the Cycles render engine. Also included are complete sculpt masking tools, allowing us to mask out portions of surface to have greater control over the detail. Many other, smaller (and not so small) features are also included. Not too mention hundreds of bug fixes.
Be sure to read the complete release notes here for the full breakdown: http://www.blender.org/development/release-logs/blender-264/