ES4: Shivering Isles - Only Expansion @ OXM

OXM is reporting an interview with 360 Magazine that sees Pete Hines saying Shivering Isles will be the first and last Oblivion expansion:

Speaking to 360 Gamer Magazine, Bethesda's Peter Hines stated; "Work pretty much started on Shivering Isles once Oblivion was done. We started looking at what we wanted to do, where we wanted to set it, all that stuff. It pretty much started last March. Shivering Isles is our last big thing: it’s our first and last expansion for Oblivion."