Movement:
WASD: Active Slot Stafe LeftRight/Forward/Backward
Arrow Keys: Move non-active characters. Strafe Left/Right/Forward/Backward
Space: All Jump
Num0: Spread Out Non-Active Characters
NumDel Follow active character.

Combat:
F: TPS/DPS Click Sequence. (uses all trinkets and racials also)
~: Avenger's Shield
E: Taunt (Tank) Purge (Shaman)
Q: Consecration
G7: Mana Tide (PvE Spec)
G8: All Elemental Thunderfury
G9: Blood Lust on RR
G10: All Fire Elemental
G11: PvE Totems (in PvE Spec) PvP Totems (in PvP spec)
G12: AoE Totems (All Tremor, All Grounding, All Magma, 4x Cleansing)
Mouse10: Fire Nova (All Elemental)

Healing: (PvE Spec Shaman 1 is Resto)
Mouse 5: Riptide (HoT)
Mouse 4: Chain Heal (AoE)
Left Click: Lesser Healing Wave: (Small Heal)
Right Click: Healing Wave: (Big Heal)
Scroll Wheel Up: Earth Shield (Shielding)
Scroll Wheel Down: Cleanse Spirit (Dispell)

The rest of my keys are setup for how I would normally play any of the characters as a single character.
F1-F4 being defensive tanking abilities or racials or PvP Trinkets depending on the spec I am in.
1-6 being standard attacks
Q being any instant aoe I have, shift q being any other type of aoe (like holy wrath)
E being taunt, Shift E being a secondary taunt.
~ being an instant ability like avengers or ele mastery/lvb combo
middle mouse is always my mount
etc

I think my healing translates well to priests and shamans and paladins but would need work for a druid. I use Vuhdo for healing frames and when I'm single boxing I use /vuhdo toggle/ and hide the frames. I use grid for my raid frames.

I will be working on mymixed team soon (DK/Priest/Mage/Warlock/Druid) once my Priest hits 80 - so this setup will get fleshed out some more, but this is the general idea of what I use now.