Basically, just downloaded the demo for a certain game off the Xbox Live Arcade - Dungeons & Dragons: Daggerdale. Immediately I noticed something interesting - quite a few sounds were ripped STRAIGHT out of Oblivion. The initial goblin enemies you fight during the tutorial? They make all the same sounds that Scamps make in Oblivion. The sounds for picking up an item/switching between inventory tabs/equipping an item? The exact same sounds as Oblivion uses.
Is this legal? I don't know. Possibly so. But I felt upset that someone would use original material created for a different game by a different company and not at least give some credit for it.
Mods, if this truly is a legal issue, I beg of you: please alert the dev team at Bethesda/Todd Howard/Pete Hines that this is going on. The team that created TES:IV is downright amazing, and deserves credit for all they do.