It's way too early for us here at WoW.com to say anything about that, we won't know until Blizzard launches the service. Personally, I don't think it would be a problem. If I understand right, the problem is that the various quests are tied to your faction, and the faction change system didn't set up quest equivalents across factions (and there was probably a good reason for it). For example, there was nothing that said Alliance Quest 274 is equal to Horde Quest 782. Since you're not switching factions with race change, I don't see why it would be an issue. There might be other factors that play a role though, so I really can't give an answer either way with any authority. Just wait and see.
Evil Midnight Lurker asked...
"What is the highest mountain currently in existence on Azeroth? Not by pen-and-paper, but by apparent height above sea level in the mmorpg."
I'm pretty sure it's Thorim's perch in Storm Peaks. Storm Peaks is a very vertical zone, you do as much up and down movement as you do running around on the ground, so it's already a pretty tall zone. Then you have Thorim's Temple which just rockets into the sky, and I'm pretty sure if you jump off with Slow Fall or Levitate, you could hit the other end of the continent if you didn't bump into any mountains or trees. Teldrassil is also ridiculously high up, but I don't think that counts because it's a tree and not a mountain. It might also be deceptive, because the shore of Kalimdor is pretty low. Storm Peaks is tall overall, which makes the Temple of Storms' height more impressive.
"Where are the dance studios? Are they even still in development? Will they be listed as a feature of Cataclysm? All future expansions?"
Blizzard has said that this is in development repeatedly. It's slow work, but they're working on it. They want it to be a good feature, and let's be honest, it's probably pretty low priority. I'd guess the people doing these dance animations are the same people animating the new races in Cataclysm, all of the bosses in Icecrown Citadel and future raids, all of the new mobs in the expansion, and all of that sort of thing. While I'm sure they're working on it, they're probably doing it between all of their other projects.
"I've heard that the Weekly Raid quests in 3.3 will award 10 Emblems of Frost & that all heroic dungeons will drop Emblems of Triumph, but I haven't heard whether or not the Daily Heroic Dungeon quest will award Emblems of Frost or stick with Emblems of Triumph. What about the Daily Normal Dungeon quest?"
If you read our site religiously, one of our postings last night probably covered this question for you. If you don't, allow me to recap.
The daily dungeons and heroics as we now know them are gone. They're being replaced with daily quests you can only complete via the new LFG tool in patch 3.3. The daily requires you to do any random dungeon/heroic at all via the LFG tool in a PUG. (Update: Poor word choice here, sorry guys. You need to do a random dungeon via the LFG tool, but it doesn't have to be a PUG. It can be 5 friends, but which instance you do is chosen by the tool.) Check out the gallery I've embedded just below for more details on the quest rewards.