We're back after our little holiday vacation, and I hope yours was way more fun than mine! Let's avoid going into detail and becoming a rambling pack of scrooges, and get into the Q&A instead! Let's start with Sl0th's very good question...
Why are we going to the Obsidian Sanctum? Sartharion doesn't seem to be doing anything except watching over eggs. He's not a direct threat to anyone like Onyxia or Nefarian were. He seems like just some random Black Dragon who's minding his own business, hanging out in the Black Dragonflight's area under Wyrmrest. Did I miss our rationale for wrecking up the place every week somewhere along the way?
Unfortunately, they didn't explain this at all in-game. At all. No quests, no nothing. Why we go in there is explained in the other Warcraft media, specifically the new Night of the Dragon series. It was released shortly after Wrath, but actually tries to set up some of the events of the expansion. A little too late for that, huh?
Sartharion and the Twilight Drake Trio guards many, many eggs of Twilight Dragons. The Twilight Dragonflight is another one of the Black's little projects to recreate their flight. Nefarian was trying to make Chromatic Dragons, remember? The Twilight dragons are a hybrid of Blacks and the mutated Netherwing dragons. Sinestra (the Black Dragon chickadee we meet in Shadowmoon Valley) is responsible for these guys. They feed off of magic, including that of other dragons.
I won't give all the nitty gritty details of the story in case some of you actually intend to read it, but that's why we go in and wipe out Sartharion. He's watching over something very bad for everyone.
Is there a good place to look at how heroic dungeons differ from their regular counterparts? I got dropped from a group because I hadn't tanked Nexus on heroic yet, and was looking for a quick read so I could pretend I had.
Dropping you from a group for that is pretty dumb, but I suppose that's not really the question. The best place for this is probably Wowwiki. If you're looking for specific bosses, you could even try Wowhead. There's usually some tips in the comments, if not a full guide for the boss. If all else fails... ask your guild!
In the patch notes for 3.0.8, it says DKs have access to new faces and skin textures. Don't we already? Or are they adding more? If they are, isn't it a little too convenient that they're released right after the recustomization option?
There's no conspiracy here, nobody is cheating you. That patch note was an error, all of that stuff is already in the game. The only thing they've mentioned wanting to do with these skins is make them easier to find, a button or option to go straight to the Death Knight specific stuff. Right now it's a little buried, you need to go to the Death Knight faces and the you get the skin colors. Or vice versa, it's been awhile since I made my Death Knight, but basically the Death Knight specific skins aren't super obvious right away. They aren't adding new ones. Just making the new ones easier to find.