We have released the final version of Embree 1.0. You can download the source code here: http://software.intel.com/en-us/articles/embree-photo-realistic-ray-tracing-kernels/
We highly recommend updating to the new version. It fixes some bugs in the tasking system on Windowsthat could severely impact performance with a large number of threads. Please see the file RELEASE_NOTES.txt in the zip archive for a detailledlist of improvements.