Indeed. There was a lot of good information in there. This post in particular:
I want to say this was the post that at some point I had forgotten the precise details of and somehow got it into my head that you could also create guilds that were comprised of members from different servers that were part of the connected realms. Same with doing dungeons/raids. Not RDF or the raid equivalent introduced in Cataclysm of course.
That might take away from the small community feel but I can also see some merit to the idea of being able to recruit folks from any realm within the cluster to run dungeons/raids with should the population on a particular server get so low that it makes it very difficult if not impossible to do so.