J. Allen Brack, one of the producers of Wrath of the Lich King, mentioned something called 'phasing technology' in an interview with Eurogamer a couple days ago. (http://www.eurogamer.net/article.php?article_id=221566)

He mentions it has to do with "world states", and depending on what 'flags' you have, you will see one or the other.

One of the most obvious examples is Ebon Hold -- for starting death knights, Ebon Hold is chock full of Naxxramas and Lich King...

Norrath

So, yesterday, one of my friends invited my paladin along on a Gruul run with his raid group.

Needless to say, since his raid group is the furthest progressed on the server (beating themselves up against M'uru at the moment, I believe -- though don't quote me on that), both Maulgar and Gruul were one-shot, despite mainly comprising of alts and randoms. I didn't exactly do much aside from keep JoV up, but I had fun regardless. All the loot was available via rolls, though they were...

Norrath

Okay, so not so much "crazy"... except that I grinded the entire thing in one day, one sitting.

My Blood Elf paladin hit 39 today, and suddenly I remembered that both WSG and AB have plate rewards available at 40 -- and as I was 39, I was just the right level for grinding it out!

Well, I did. 41 AB marks and 22 WSG marks later, my Blood Elf now is the proud owner of [item]20209[/item], [item]20206[/item], and [item]19581[/item].

And I'm still...

Norrath

The last week or so I've been playing on a Blood Elf paladin I rolled on the newest EU realm -- Blade's Edge, PvE.

Yesterday I finally got what I wanted -- the Blood Elf paladin mount. I hit level 30, and immediately rushed off to the trainer to learn Summon Warhorse.

Ever since I saw it the first time, I've been jealous.

The guild I'm in is surprisingly active, with between 10 and 20 players on most of the day. It's a decent guild, with some bad apples...

Norrath