Is there an official version of Cycles anywhere?
Cycles is not yet in an official blender release, so no.
The first official release of blender with an early version of cycles will be in 2.61 though, and that’s two months away.
However, since Blender is open source, you can download blender builds or compile them yourself at any point of it’s development.
People upload builds at www.graphicall.org
You can find builds with cycles (And other not yet trunk features) there too.





