In light of the Mists of Pandaria beta going live, I've taken the liberty of creating threads with information and changes to the different healing classes. I'll add any blue posts that affect the class as well. Feel free to contribute material if you see anything that isn't listed there. Please remember to source it.
Monk - Added glyphs and talents
Priest - Added glyphs and Kaivax comment on AoE healing
Paladin - Glyphs
Druid - Glyphs
Shaman - Glyphs and Level 90 talents