My team is passing 60 at the moment. I have mapped the numberpad keys for the secondary toons. Mostly for healing. I haven't spent much time working on additional keys, yet. Currently thinking about how to work CC into the mix (sheep, hunter freeze trap, druid root). Please keep sharing your thoughts and experiences.

60 War - Prot Spec
61 Druid - Heal Spec ATM
61 Priest - Holy Spec
61 Mage - Arcane Spec
70 Hunter - Beast Spec

Ins = Heal Hunter - priest, druid
1 = Attack, Nuke, use wand
2 = Back up - all
3 = Attack, different Nuke, use wand (this one is situational)
4 = Heal Hunter - priest, druid
5 = Follow - all
6 = Heal Druid - priest, druid
7 = Group Heal - priest, druid
8 = Heal Pet - priest, druid, hunter
9 = Heal Priest - priest, druid
- = Mount - all
+ = Heal Warrior - priest, druid

* = unassigned (hunter aimed shot)
del = unassigned (assist war and pet attack
/ = unassigned (hunter steady shot)

Sojolly, Silvermoon US