The theming mechanism in D2 is great but I would like to be able to override as many default D2 styles as possible (example: I don't want white backgrounds in widgets). I'd rather not modify the core stylesheets and change it for the entire application but would like to apply context to the ui changes so that only certain groups of individuals will point to certain stylesheets.
Is there a plugin out there that has already done this or is this even possible?