Take the following with a grain of salt since I haven't been able to confirm the source:
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- World of Warcraft PTR Patch 2.4.0 (2008-2-11)
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The latest PTR patch notes can always be found at
WoW -> Test Realm Patch Notes
The latest patch notes can always be found at
WoW -> Patch Notes -> Current Patch Notes
Sunwell Isle
Surrounded by the Sunwell Grove, the Sunwell is a fountain of ancient
power at a convergence of powerful ley energies in Quel'Thalas,
created by the high elves who used a vial of sacred water stolen from
the Well of Eternity.
In this time of great peril a new force seeks to unleash the evil from
within this ancient source. Adventurers will be faced with the task of
destroying the threat to the stability of Azeroth and reclaiming the
Sunwell.
- Sunwell Plateau is a new 25 person raid which features 6 all new
bosses.
- The Magister's Terrace is a 5 person dungeon which will feature
both normal and heroic difficulties.
- In addition, a new faction called the Shattered Sun Offensive has
taken up residence outside the new dungeons and will offer a
slew of new daily quests for players to experience.
General
- Additional benefit will be seen by users with today's popular multicore
processors like the Intel(r) Core(tm)2 Duo processor family. Additional
threads have been spread across both processor cores.
- Desolace has seen many improvements with the addition of over 30
new quests and a new Alliance town called Shadowbreak Point located in
the southern part of the zone. Players will also see improved monster
spawning times and density.
- The maximum daily quest allowance has been increased from 10 to 25.
- Characters now retain talented spell ranks.
- Spell haste now reduces the global cooldown on spells, down to a minimum
of 1 second. This change does not apply to melee and ranged abilities.
- The restriction on summoning players into instances as well as restriction
on summoning players to Netherstorm have both been removed.
- The Kirin'Tor Mages have worked together to create a permanent portal to
the Caverns of Time. Players who have attained a friendly reputation will
be able to use the portal which will be located in Shattrath City.
- A new flight path has been added to southeastern Silithus near Ahn'Qiraj
as well as a new small quest hub for both Horde and Alliance.
- Players level 20 and below will no longer be afflicted with Resurrection
Sickness upon death. Resurrection Sickness now begins at level 21 at a timer
of 1 minute increasing until level 30 at a timer of 10 minutes.
- Players attempting the racing quests for the netherwing faction will no
longer benefit from Crusader aura during the quest.
- Undead Males main hand weapon size has been fixed.
- Equipping a thrown weapon while in the middle of an Auto-Shot will no
longer cause an animation issue.
- The Gnome racial ability Escape Artist will now properly remove the
Unstable Cloud debuff.
- Deleted characters no longer take up space in an arena team.
- Male Blood Elves can once again blink.
Racial Abilities
- Undead: Will of the Forsaken cooldown increased from 2 minutes to 5
minutes.
- Human: Diplomacy reputation bonus decreased to 3% and a new component
has been added decreasing repair costs as reputation increases.
- Tauren: Endurance bonus reduced from 5% to 3%.
- Dwarves: Treasure chests now appear on the minimap for all players so
Find Treasure has been replaced with Mining Mastery.
Dwarves: Mining Mastery added in place of Find Treasure. Mining Mastery
increases the chances that mineral nodes yield rare minerals!
PvP
- Arenas
A new buff has been added to all PvP arenas increasing movement speed
by 50% for 15 seconds. This buff will appear in the center of each arena
and will have a respawn time of 2 minutes.
Star's Tears: The amount of mana restored has been reduced to 4320 and
maximum stack size reduced to 10.
Vendors have been added outside Blade's Edge and Nagrand arenas who
stock various reagents, food, and water.
- Battlegrounds
New daily quests have been added for each PvP battleground. These new quests
will be located at the Alliance Brigadier Generals and Horde Warbringers near
your faction's battlemasters in all major capitals.
Alterac Valley
- The Horde starting tunnel has been moved back to a more equal distance
from the first objectives.
- Generals and Warmasters for each faction will receive a stacking buff
from each other that boosts their health and damage. The more of them that
are still in the battleground, the more dangerous they will all be.
- Balinda Stonehearth has become a more challenging opponent to the Horde
and will do more damage with her spells.
- Balinda Stonehearth and General Vanndar Stormpike have both had their health
reduced to previous amounts.
Eye of the Storm
- Spawn points for both factions have been lowered.
Warsong Gulch
- A new system has been introduced to Warsong Gulch changing the flag carrier
buff. The Warsong Flag buff now has a timer of 5 minutes. After this timer
has expired the flag will reset to the appropriate flag room.