I have tested the latest build under the build bot downloads for 64-bit. It seems that blender vse is now using more cores for rendering videos. The new blender uses 80% roughly of my 4 cores where as the official 2.63a release only uses about 30%.
The downside however is that for some reason the render times in the newest build compared to the official release has increased alot despite more of the cpu being used. Both were using the same exact settings by the way.
I still look forward to blender vse getting better as time goes on keep up the great work guys.