The concept of factions seems to be all the rage throughout wikidom these days. I recently came across a list of major factions at a wiki whose name and address I've since forgotten. According to that list, the factions are (more or less) as follows:
Apparently members of these factions tend to view most or all of their activities as ideally directed toward their agendas. This, it seems, has been identified as a problem in various wikicultures. For this reason the pubwan NeutralityPrinciple was invented.