Reading these also make me excited, because I never got the chance to play the first few Fallout games, and I actually thought that Fallout 3 was a serious game. It'll be nice to see a little bit of humor injected into this iteration. I'm about 2 hours into the game, and I'm absolutely loving it. (No glitches, either).
As for why it's called a bug? I believe it goes back to when computers were vacuum tubes and actual bugs would get into the machines and screw stuff up. Don't quote me on that, though, unless it's right.
@The_Laughing_Man: I would agree with that. Think of how much money they made when they released it for Fallout 3. At the end of the day, they can tell us there's a "Real Ending" all that they want, but it's still a business and their ultimate goal is still to make money.