Blender 2.54 or maybe 2.55 has been released to the public for their general use and fondling.
There has been a ton of new features as always, but your own use and mileage is going to vary. Hit their website for the specifics. I can never tell exactly what is in their updates as they munge the newest updates with others in the current stage of their roadmap.
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Apparently they fixed 360 bugs
So it wont RROD?