Back to Leveling?

So I'm very close to accomplishing most of the goals that I set out for myself after hitting 85 on character #10. At that point, I was mostly looking to finish leveling my remaining professions, work on getting my main to exalted with the guild, finish gearing a few more toons and work on making some gold.

The addition of the Molten Front dailies have added yet more for me to do, so at this point, I'm starting to lose interest in all of it. I could still potentially work on gearing the shammy, warrior and rogue a bit more, but I've gotten to the point that the frustrations of the groups that I get through the dungeon finder tool generally outweigh the time invested.

So I'm debating switching back into the leveling game and moving on from just having 10 characters at max level and try to go for 20 by the time the next expansion hits. The plan is that having done a Horde character of each class, I would then switch and try to do an Alliance character of each class.

I've already started to set this up as you may have noted from my sidebar. So here is where I stand on the Alliance front:

Gnome Death Knight - level 65
Night Elf Hunter - level 30
Worgen Warlock - level 13
Dwarf Warrior - level 12
Gnome Mage - level 8
Dwarf Paladin - level 7
Human Priest - level 7
Draenei Shaman - level 7
Night Elf Druid - level 6
Worgen Rogue - not yet started.

So that's the collection. That's 155 total levels with 850 to go, which would take 695 levels between now and the next expansion. If I generally average a level per day, that's probably not happening, but it might be interesting to try. If I guesstimate the next expansion at 12/15/2012, that's 501 days, so 1.4 levels per day.