Oblivion is getting its last official add-on titled "Fighter's Stronghold". Here's how Bethesda describes it:
Fighter’s Stronghold provides the last of four themed domiciles (along with Vile Lair, Thieves Den, and Wizard’s Tower) for the adventurer on-the-go. You inherit the rights to Battlehorn Castle, located on a lovely stretch of the Colovian Highlands, west of Chorrol. Dining Hall, barracks, wine cellar, training room, and your own private Shrine of Julianos. Update your castle furnishings, perhaps even a Dwemer Forge for the aspiring Armorer? Hire a taxidermist to tastfully decorate your new abode with trophies from your adventuring.
But wait... what about the PS3 version?
There is no word of if or when this content will hit the PS3, but Bethesda did announce that The Shivering Isles will be released on the PS3 soon.
It could be as a download or a disc, but more content is always good. Hopefully, it'll just be a download.