Krippendorff's alpha

[OKB (not okblacke)]

    	Does anyone know of a Python implementation of calculating 
Krippendorff's alpha?  ( 
http://en.wikipedia.org/wiki/Krippendorff%27s_Alpha )

Thanks,
-- 
--OKB (not okblacke)
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown