No, Titanium Powder was not an option at Wrath of the Lich King's launch. You couldn't prospect Titanium to acquire Titanium Powder until patch 3.2, when the epic gems and gem cuts were implemented. My personal prediction is that Cataclysm will go the same way. Around patch 4.2, Blizzard will implement epic gems; you will be able to get them (rarely) from Pyrite Ore, and you will also be able to get Pyrite Dust.
Do note: That's only my personal theory. Don't be disappointed if it doesn't happen. Blizzard has never said that's what it'll do.
Where's Thrall? If you do all of the quests in Deepholm, you see the Earthen Ring leave the Temple of Earth. Wouldn't Thrall be able to leave, too?
I think the situation at the Maelstrom is a two-way street, but we've only been able to close one lane. We rebuilt the World Pillar and kept Azeroth from collapsing into the Plane of Earth, but the Maelstrom was a pretty screwed-up place to begin with, and Deathwing did even more damage to it. Azeroth won't collapse in on itself anymore, but there's still a great big rift in the planet.
I've seen you guys mention patch 4.1 recently, but do we even know anything about it? Has Blizzard talked about it yet? What's in it?
Blizzard has talked a little about patch 4.1, but nothing too in depth. I'm going to be a jerk and not answer your question here, but rather advise you to keep an eye on the site. A post outlining what we know about patch 4.1 will be popping into existence in the very near future.
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