A test release of Blender 2.71 was made available this week in the lead-up to the release candidate and final version that will be out in the weeks ahead.
Blender 2.71 with its Cycles rendering now supports fire and smoke rendering, deformation motion blur, various optimizations, and support for NVIDIA Maxwell cards when it comes to CUDA support. Blender 2.71 also adds OpenGL render options to its UI, animation improvements, multi-threaded animations within the Blender Game Engine, and many improvements within the Freestyle NPR Rendering.
More information on the Blender 2.71 test release can be found via Blender.org. Below is an official video showing off the smoke and fire support within Cycles that's new to this release.