I've been spending my time musing about Northrend when it occured to me that I had no idea how to get to Dalaran. Since I am not high level enough for any kind of questing in Northrend this is somewhat theoretical but should still work just fine:
1. Get to level 71
2. Group up with someone that already is in Dalaran
3. Have that someone queue the group up for a Battleground
4. /afk out of the battleground or run out.
The level 71 will ensure you end up in the right queue, the fact that your buddy in dalaran queued the group means that is now the default location for people to pop out when they're done with the bg.
I couldn't come up with anything simpler than that other than paying a mage or figuring out what the actual questline is to get to dalaran. Assuming that the quest doesn't come any sooner than lvl 71 anyway...
Just a thought but maybe worth the post depending on how far you are at in Northrend.