I have four level 70 characters that I've decided to level to 80, my two horde 70's (tauren warrior, orc shaman) and my draenei warrior and shaman. (I may or may not level my human warrior, and if I get my BE paladin to 70 by then, he'll be in the running to go the distance as well.) As a result, I'm playing catch up with them... making sure their professions
are maxed, trying to make sure they have if not great gear than the best gear possible (I know it will be replaced, but doing those initial quests in the new zones is always easier with better gear), supplies of netherweave
for when the new first aid comes out, that kind of thing. I was caught unaware the last time we had an expansion as far as what was needed to make things easier, I don't intend to be so caught again.