Comment 1 for bug 353400

yeah, this can be done http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html
and I think could be implemented nicely with a moin macro so on pages where we always want a particular variant to be indexed we could include <<Canonical(edubuntu)>> somewhere and it would sort it all out. Some pages we probably don't care which one gets indexed and would normally end up with the wiki.ubuntu.com branding.