Problem with utilities (and I'm using a wide definition here that includes things like VCAs, mixers, attenuverters, etc) is that they SEEM optional, while those of us here on the other side of the looking glass know that they're not. So, in addition to a list of important ute modules, some explanation for WHY these matter as much as they do (with examples!) would probably also go a long way to curtailing (some) the Sexy Module Syndrome.