Blizzard has made public a long list of class changes that are lined up for patch 3.1. Over half the classes have had their basic changes laid out, including druids, warriors and the long-suffering warlocks.

One of the biggest challenges is for Blizzard to make classes like the rogue more viable in PvE, without damaging their fragile PvP balance. With that in mind, there are many changes lined up for the combat tree, such as a reduced cooldown on Adrenaline Rush and haste on Mace Specilisation. Mages are the other big burst damage class, but their changes are yet to be released.

On the healing side of things, every class is playing catch-up with paladins right now. Priests' Penance spell is now able to target its caster, while the classes group pvp utility got a big buff via a new talent which has been labeled as "Power Word: Shield for your whole group."

Restoration shamans haven't had any specific changes announced yet, but some of their most important PvP totems have been combined. Mana and Healing Stream totems will be fused into one, as will Poison and Disease Cleansing.

Only four classes have yet to be detailed, but Blizzard stresses in their posts that this is far from being a completed list. In particular, the warlock changes state, somewhat cryptically that "additional new talents have been added."

You can find the first group of changes (priest, rogue, shaman) here and the second group (warlock, druid, warrior) here