IGN interview, october 11th:
IGN: Are all of the add-ons going to ship with it or will they still be extra?
Howard: The downloadable content is actually designed to work with a game that is in-progress and doesn't work as well with a new game. So instead we focused on Knights of the Nine as the new stuff to add to Oblivion that would work well no matter where you are in the game. Downloadable content is something we'd like to support on PS3, but right now that's really in Sony's hands.
IGN: How will the PS3's tilt functionality be utilized in the PS3 version?
Howard: We aren't supporting tilt.
IGN: Will there be a special edition like the X360 and PC versions had?
Howard: No, standard edition only.
IGN: Are you able to use the hard drive on the PS3 to make the world stream better?
Howard: We use it pretty much the same way we use the 360 hard-drive.
IGN: Will the Knights of the Nine quests eventually become available for X360 and PC players of Oblivion, or are they exclusively PS3's?
Howard: We always aim to have all our content available across all platforms, so Yes that is our goal.
IGN: Has Sony been able to provide you with enough information so that downloadable content for Oblivion will be available for the PS3 version somewhere down the line?
Howard: How Sony will handle this is still a little fuzzy to us, but it is our intention to make that content available for PS3 as soon as we're able.