I really would recommend that it at least be hosted here at ecomodder if not at google.
ecomodder wiki (also wikipedia software):
MPGuino - EcoModder
google wiki (my favorite):
opengauge - Google Code
I'm very glad to see someone take an interest in the documentation, but I don't like the branching of the server base so much (or the ads and support differences), and there is a long long long way to go on the documentation.