Elder Scrolls IV: Oblivion Interview

eToychest has conducted an interview with Bethesda Softworks' Pete Hines, quizzing the PR rep about their much anticipated RPG, The Elder Scrolls IV: Oblivion. One Q&A to follow:
Q: Where exactly do those Oblivion Portals lead, and how much time will the player spend there?

A: They lead to Oblivion, which is another plane of existence. You'll spend some time there as part of the main quest, but beyond that how much time you spend there is up to you. Random gates will continue to appear in the world as long as the main quest goes unfinished, and you can choose to enter those random gates, or not.