TheSixthAxis: Greg's already discussed at length the various options Sony are considering for what has been dubbed PSN Premium, but one of the features not mentioned on the list (which did appear to cover every other angle possible) is paid subscription for games. Currently the closest thing we've got to a continued, steady revenue stream for developers is the episodic content model (such as that seen in Blue Toad or Siren) but going down the route of a full subscription service is one step ahead.
Over the weekend some PS3 users (including myself) were asked to take part in a survey by a third party, and one of the questions relates to this very matter. "How likely would you be to subscribe to a service like this in the future?" asks the questionnaire referring to a hypothetical paid subscription service for films, music or games. Well, this could infer a number of things – an ad free Vidzone (as Greg pointed out) or some kind of Netflix-esque affair for European PS3 owners.