PTR as of 14 MarFollow

Blood
* Blood Strike: Bonus damage for diseases is now a multiplier rather than a flat bonus.
* Death Strike: The weapon damage percent on this ability has been increased from 60% to 75%, but the amount of healing per damage done has been reduced by 20%.

Frost

* Chillblains: Now a 15/30/50% movement speed debuff up from 30%. Can no longer be dispelled.
* Frost Presence: Now grants 5% damage reduction instead of 15% magic damage reduction.
* Obliterate: Bonus damage for diseases now increases damage done by a percentage rather than a flat amount.
* Dancing Rune Weapon: Damage done by this pet is reduced by 50%, but the cooldown is reduced to 90 seconds.
* New talent: Improved Death Strike: Increases Death Strike damage by 10/20%, and critical strike chance by 3/6%.
* Heart Strike: Bonus damage for diseases is now a multiplier rather than a flat bonus.
* Might of Mograine: No longer affects Obliterate.
* Scent of Blood: Will now proc on a dodge, parry or when taking damage, and now grants 10 runic power per charge. Internal cooldown removed.
* Spell Deflection: This talent has been increased to 15/30/45% damage reduction.
* Chillblains: Now a 15/30/50% movement speed debuff up from 30%. Can no longer be dispelled.
* Howling Blast: Base damage and scaling doubled. This ability no longer deals bonus damage to targets with Frost Fever. Cooldown increased to 10 seconds. Swapped positions with Hungering Cold in the talent tree.
* Lichborne: No longer improves your chance to be missed. Now correctly grants immunity, and will break all effects to which Lichborne makes you immune.
* Runic Power Mastery: Moved up to tier-1 and reduced to 2 ranks (15/30%).
* Unbreakable Armor: Now grants damage reduction instead of physical damage reduction. Cooldown increased to 2 minutes from 1 minute.

Unholy

* Desecration: This talent now has a 100% chance to be triggered, works with Scourge Strike, and instantly snares targets within the Desecration area. Additional points in the talent increase the damage bonus and snare magnitude instead of increasing the chance it will be triggered.
* New Talent: Ghoul Frenzy: Grants 25% melee haste to your pet and heals it for 30% of its maximum health. Costs 1 Unholy Rune.
* Outbreak: No longer increases Blood Boil damage. Now gives a 7/13/20% damage bonus to Scourge Strike. Plague Strike Bonus lowered to 10/20/30%.
* Reaping: Now procs on Blood Strike and Pestilence instead of Blood Strike and Blood Boil.
* Scourge Strike: Damage increased. Bonus damage for diseases now increases damage done by a percentage rather than a flat amount.
* Shadow of Death: This talent has been removed.
* Vicious Strikes: This talent no longer affects Death Strike.

Glyphs
Death Knight

* Glyph of Blood Boil: This has been replaced with Glyph of Heart Strike, which adds a snare effect to Heart Strike.
* Glyph of Death Strike: This glyph now increases Death Strike damage by 1% per 2 runic power, but has a limit of 25% increase.
* Glyph of Icebound Fortitude: Icebound Fortitude now grants at least 30% damage reduction, regardless of defense skill.
* Glyph of Unbreakable Armor: Increases the amount of damage absorbed by Unbreakable Armor by 20%.

http://www.worldofwarcraft.com/patchnotes/test-realm-patchnotes.html

There you go, a link.

Some interesting T8 info also:

"Tier Bonuses

* Item - Death Knight T8 Melee 2P Bonus (Class: Death Knight) -- Increases the critical strike chance of Death Coil and Frost Strike by 5%.
* Item - Death Knight T8 Melee 4P Bonus (Class: Death Knight) -- Increases the bonus damage done per disease by 20% on Blood Strike, Heart Strike, Obliterate, and Scourge Strike.
* Item - Death Knight T8 Tank 2P Bonus (Class: Death Knight) -- Increases the damage done by Rune Strike by 5%.
* Item - Death Knight T8 Tank 4P Bonus (Class: Death Knight) -- Anti-magic shell also grants you 10% reduction to physical damage taken."

I like the melee 4p bonus...