It's nothing to worry about, everything is fixed now and should be just fine. In the process of making things fine, our RSS feed was pinged with all sorts of 'new' information, causing the duplicates that a lot of you saw. Seven postings of the latest Around Azeroth? WTF? Yeah, sorry about that. We definitely keep an eye on our own RSS feed to make sure everything is going smoothly, so if it isn't, we'll know about it pretty quickly.
Again, we're sorry about the spam to you guys using our RSS feed. To those of you that aren't using our RSS feed... why aren't you using it!? Google Reader is probably one of the most convenient things ever. You can find out about our various feed offerings over here.