Updated 5:43 EST: listed the official patch notes instead of the expected patch notes.

It seems that 2.4 is going live today. MMO Champion has a very comprehensive roundup of what the patch is bringing to the table here

Shaman specific patch notes (note that the fix for Chain Lightning skipping CC targets has been REMOVED):

• Call of Thunder: (Rank 5) now gives 5% critical strike chance, down from 6%.
• Earth Shield: Mana cost reduced roughly in half, and charges reduced from 10 to 6.
• Elemental Focus: This buff will no longer be removed when Shamanistic Focus is triggered.
• Flametongue Weapon: Having different ranks of this enchantment cast on two different weapons will no longer cause the enchantments to trigger multiple times per swing.
• Ghost Wolf: Cast time reduced to 2 seconds, down from 3.
• The Global Cooldown of all Totems has been reduced to 1 seconds, down from 1.5 seconds.
• Healing Grace: This talent now reduces the chance your spells will be dispelled by 10/20/30%.The resistance to being dispelled modifier from this talent now applies correctly to Water Breathing.
• Rockbiter Weapon: Tooltip and error messages have been adjusted slightly.
• Shamanistic Rage is now a Physical ability instead of a Magic spell, and thus is no longer dispellable. It now reduces all damage taken by 30% and gives your successful melee attacks a chance to regenerate mana equal to 30% of your attack power. This lasts for 15 seconds with a 2 minute cooldown.
• Stormstrike has a new icon.
• Totem timer icons will now show up under your player portrait when you cast totem spells. Right-clicking a totem timer icon will destroy that totem.
• Toughness will now also reduce the duration of movement slowing effects on you by 10/20/30/40/50%.
• Tremor Totem now pulses every 3 seconds, down from 4 seconds.
• The Shaman spell Fire Nova Totem will no longer sometimes detonate without doing any damage.