As a sidenote to the Valentine's Day guide from earlier: Don't even bother to try the Love quests in the new cities. As Memory from Scilla notes, the guards there are completely bugged-- in Silvermoon, guards talk about Stormwind (I even, as a Blood Elf, had one try to speak Dwarven to me).
Now, Drysc says it's a known problem that has to do with the event itself, so if the problem isn't fixed soon, it'll go away for sure by Thursday, since that's when the Love event ends. And there's no real point to tooling around looking for love in the expansion cities anyway-- Kwee Q. Peddlefeet isn't there at all (because not all players, I suppose, have the expansion, and that would mess up the popularity contest, since all the rewards are city specific). So this isn't exactly the end of the world, even though when you get Heartbroken, it may seem like it.
But for the moment, good luck trying to find your way around an expansion city you don't know. I was trying to find the Mage trainer in Silvermoon, and had to just give up and run back to the newbie area to train my new spells.