My current plans are to level a 4 box of warlocks to 60... that will give me 30 levels on each of two accounts to gift... and since my shaman just hit 60 I've already got 30...

I don't overly enjoy leveling druids or hunters and don't want them for multiboxing, so I intend to gift one of each to 60... this is indeed good info, kill a few lowbie mobs and get to 99% of a level completed and then gift away.