EDIT: added in some of MMO champions newest notes.
Added 02.24:Frost
* The following talents have moved in the Frost tree: Runic Power Mastery, Glacier Rot, Killing Machine, Chilblains, and Endless Winter.
* Black Ice now grants 2/4/6/8/10% Shadow damage in addition to the Frost damage.
* Black Ice: Frost Damage bonus lowered to 4/8/12/16/20%
* Blood of the North is 3 ranks instead of 5 for the same effect.
* Chillblains: Now a 15/30/50% movement speed debuff (up from 30%). Moved to position currently occupied by Glacier Rot.
* Endless Winter: Moved to position currently occupied by Chillblains.
* Frost Aura: Replaced with Improved Frost Presence. Allows the deathknight to keep the health bonus of Frost Presence in any presence, and decreases magic damage taken while in Frost Presence.
* Glacier Rot: Third rank added, and damage bonus increased to 7/13/20. Moved to position currently occupied by Endless Winter.
* Howling Blast: Swapped positions with Hungering Cold in the talent tree (HB is now at 51, and HC is now at 31). In addition, the damage bonus for targets with Frost Fever is now only 20%.
* Icy Talons - This talent how has a new icon.
* Runic Power Mastery down to 2 ranks.
* Hungering Cold and Howling Blast have switched places in the talent tree.
* Howling Blast (Tier 11) now deals 50% additional damage to targets infected with Frost Fever. (Previously dealt double damage)
* Unbreakable Armor (Tier 8 ) now Reinforces your armor with a thick coat of ice, reducing physical damage from all attacks by 0.05 and increasing your strength by 25% for 20 sec. The amount of damage reduced increases as your armor increases. (Previously just increased armor by 25%, strength by 10%, and parry by 5%)
* Blood of the North (Tier 8 ) now affects Frost Strike as well as Blood Strike.
* Chillblains (Tier 7) now reduces movement speed by 15/30/45%. (Previously 10/20/30%)
* Endless Winter moved from Tier 6 to Tier 4.
* Chill of the Grave moved from Tier 5 to Tier 4.
* Runic Power Mastery moved to Tier 1 and is now a 2 point talent. Increases your maximum Runic Power by 15/30. (Previously 3 point talent that increased runic power by 10/20/30)
* Black Ice (Tier 2) increases your frost damage by 4/8/12/16/20%. (Previously 6/12/18/24/30%)
* Glacier Rot moved from Tier 1 to Tier 5 and is now a 3 point talent. Now diseased enemies take 7/13/20% more damage from your Icy Touch, Howling Blast and Frost Strike. (Previously 5/10%)
EDIT: Interesting Glyph Changes:
# Glyph of Pestilence *new* -- Your Pestilence ability now refreshes disease durations on your primary target back to their maximum duration.
# Glyph of Howling Blast *new* -- Your Howling Blast ability now infects your targets with Frost Fever.