Should there be in that list of resources a heading for forums and similar groups? I don't want to add one without some discussion about it first.
It is a community wiki, as such please add any info and resources you find that fit in to the categories that are already there (and there is no need to ask first to do so).
However if you want to add a new category (such as reference images), or restructure the answers that are there (say merge blogs and community sites which I think would be a good idea), please ask on the meta first.
To answer you question.
Yes a general blender sites answer is a good idea.
It could contain blogs, tutorial sites, forum(s), etc.
Thank you for making the Resources for Blender list better.