OOXML rigged

You're missing the point.  OOXML is carefully designed to NOT be fully implementable by anyone
other than Microsoft.  Stuff like an attribute meaning "do it the way Word6.0 does it" without
specifying what it does.  Besides, Microsoft has NOT committed to actually USING OOXML; I
fully expect that files written out by Office will _not_ stick to just the capabilities noted
in the OOXML specification.  No doubt, OOXML will be used, and applications will need to
ATTEMPT to work with it.   As a stepping-stone to a nonproprietary format, OOXML can work, but
it's not (and is not intended to be) a non-proprietary format that anyone can use or
implement.