It looks like the big patch has finally been pushed to the live servers. Highlights that will affect healers specifically:

Druid
- Training costs adjusted. Total training cost was decreased.
- Rebirth - Casting time and mana cost reduced; now ignores
  resurrection timers.
- Swiftshifting - Talent changed. When leaving a shapeshift form, the
  next shapeshift form you take will have a 20%/40%/60% mana cost
  reduction if used within 6 seconds.
- Gift of the Wild - This spell is now cast on the target's party.
- Cat Form - DPS increase at levels 40-60.
- New Ability (Cat Form): Ferocious Bite (available at level 32) -
  Finishing move that causes damage per combo point and converts each
  extra point of energy into additional damage.
- New Spell: Barkskin (available at level 44) - The druid's skin
  becomes as tough as bark.  Physical damage taken is reduced. While
  protected, taking damage will not cause spellcasting delays, but
  non-instant spells take longer to cast and melee combat is slowed.
- New Ability (Bear Form): Frenzied Regeneration (available at level
  36) - Converts an amount of rage into health every second for a
  short duration.

Paladin
- Training costs adjusted. Total training cost was decreased.
- Blessing of Protection - Now castable on all raid targets.
- Blessing of Sacrifice - Now castable on all raid targets.
- Blessing of Salvation - Now castable on all raid targets.
- Divine Intervention - Now castable on all raid targets.

 Priest
- Training costs adjusted. Total training cost was decreased.
- Holy Fire - Fixed a bug with the bonus damage gained from +fire
  damage items. Such items now have a greater effect on this spell.
- Prayer of Fortitude - This spell is now cast on the target's party.
- Power Word: Shield - Now castable on all raid targets.

- Priests can no longer kill players with Shadow Word: Pain and Mind
  Control in duels.


You can view all of the patch notes here.