Originally Posted by Cpt. Hammer

Warlock glyphs have been datamined:

Glyph of Banish (Warlock): Increases the duration of your Banish by 5 sec.
Glyph of Conflagrate (Warlock): Reduces tha mana cost of your Conflagrate by 20%.
Glyph of Corruption (Warlock): You Corruption spell has a 4% chance to cause you to enter a Shadow Trance state after damaging the opponent. The Shadow Trance state reduces the casting time of your next Shadow Bolt spell by 100%.
Glyph of Curse of Agony (Warlock): Increases the duration of your Curse of Agony by 4 sec.
Glyph of Death Coil (Warlock): Increases the duration of your Death Coil by 0.5.1 sec.
Glyph of Fear (Warlock): Increases the damage your Fear target can take before the Fear effect is removed by 20%.
Glyph of Felguard (Warlock): Increases your Felguard's physical damage by 20%.
Glyph of Felhunter (Warlock): Increases your Felhunter's spell damage by 20%.
Glyph of Health Funnel (Warlock): Increases the chance you'll resist spell interruption when channeling your Health Funnel spell by 100%.
Glyph of Healthstone (Warlock): You receive 30% more healing from using a healthstone.
Glyph of Howl of Terror (Warlock): Reduces the cooldown on your Howl of Terror spell by (-8) sec.
Glyph of Imp (Warlock): Increases your Imp's spell damage by 20%.
Glyph of Searing Pain (Warlock): Increases the critical strike bonus of your Searing Pain by 20%.
Glyph of Shadow Bolt (Warlock): Reduces the mana cost of your Shadow Bolt by 10%.
Glyph of Shadowburn (Warlock): Increases the critical strike chance of Shadowburn by 20% when the target is below 35% health.
Glyph of Siphon Life (Warlock): Increases the effect of your Siphon Life spell by 20%.
Glyph of Soulstone (Warlock): Increases the amount of health a player gains from resurrecting via your Soulstone by 100%.
Glyph of Succubus (Warlock): Increases the duration of your Succubus's Seduction by 3 sec.
Glyph of Unstable Affliction (Warlock): Decreases the casting time of your Unstable Affliction by 0.2 sec.
Glyph of Voidwalker (Warlock): Increases your Voidwalker's health by 20%.

From Worldofraids.com