It’s actually a test build, but it is certainly worth checking out and helping out the Blender team. So what can you expect in this test build ( and hopefully in the upcoming release )?
Bevel and inset are now mouse controllable ( woot! This one falls under the category of WHAT WERE THEY THINKING??? problems before ).
Tons of Cycles changes
Motion tracking now includes planar tracking
Snap to vertice/face/edge implemented in Pose mode for bones
Sculpt masking add to the Sculpt tool
And perhaps most important of all, especially for game developers… improved COLLADA support!