I saw Shamaya did this last update and since we haven't had anyone make this thread yet I'm going to go ahead and do it myself. However I'm only going to list the items I've discovered and their stats rather than throw down a list of possible uses and entire gearsets. I'm also going to omit the defense rating and irrelevant stats on armor because let's face it, we don't really care about armor rating or changes in vitality when choosing gear. This list is taken from THIS web blog so all credit goes to the author. I'm merely consolidating the new thief stuff into one place. So with that said here goes.
Quick Disclaimer: This list may or may not be complete. If anyone finds some items missed in this .DAT mine please let me know.
Weapons
Rapidus Sax
Damage 32, Delay 150
Accuracy +12
Haste +1%
Magnus Dagger
Damage 29, Delay 176
Magnus Stone Equipped: Occ. deals double damage
Thunder Kila +1
Damage 41, Delay 190
DEX + 8, Accuracy + 14
Fire Kila +1
Damage 41, Delay 190
STR +8, Attack + 18
Wind Kila +1
Damage 41, delay 190
AGI + 8, Evasion + 18
Paranz. +1 (OAT path)
Damage 22, delay 211
DMG + 14
Occ attacks twice
Paranz. +1 (OA 2-3 path)
Damage 22, delay 211
Occ attacks 2-3 times
Paranz +1 (DA path)
Damage 22, Delay 211
Damage +21
Double Attack + 9
Fusetto +1 (STP Path)
Damage 38, Delay 186
Store TP + 13
Daka +1
Damage 45, Delay 201
"Rudra's Storm"
Clement Skean
Damage 39, Delay 176
Latent Effect: "Mercy Stroke" (The latent is confirmed to activate once every 13 weaponskills)
Mandau (lvl85)
Damage 46, Delay 176
Attack + 30
"Mercy Stroke"
Addl Effect: Poison
Vajra (lvl 85)
Damage 43, delay 200
Enhances "Sneak Attack" effect III
Enhances "Trick Attack" effect III
Mandalic Stab
Aftermath:Increases acc/attack/occ attacks twice
Twashter (lvl 85)
Damage 45, delay 176, Dex + 10
"Rudra's Storm"
Aftermath: Occasionally deals double damage
Ammo and Ranged
Raider's Boomerang (returning ranged weapon)
Damage 43, Delay 286
Accuracy +3
Enhances "Dual Wield" effect
Qirmiz Tathlum (ammo)
Attack + 3
Increases Critical Hit Damage (NOTE: According to some testing by Breaze this appears to be a 5% damage increase at first glance. Good stuff man.)
Head
Aias Bonnet
STR +8
DEX +8
Accuracy +5
HP-20
Raid. Bonnet +2
Haste + 6%
Accuracy + 12
Triple Attack Rate + 3%
Enhances "Accomplice" Effect
Enhances "Collaborator" Effect
SET: Augments Triple Attack
Raid. Bonnet +1
Haste + 5%
Accuracy + 8
Enhances "Accomplice: Effect
Enhances "Collaborator" Effect
Body
Taranis's Harness
Accuracy + 25
Store TP + 5
Hands
Ample Gloves
Str + 5
Dex + 5
CHR +5
Evasion -8
Legs
Ambusher's Hose
AGI + 10
Raid. Culottes +2
Haste +5%
Dex +7
Critical Hit Rate +4%
"Despoil +5"
SET: Augments Triple Attack
Raid. Culottes +1
Haste +4%
Dex +5
"Despoil +3"
Feet
Raid. Poulaine's +2
AGI + 15
Evasion + 11
"Treasure Hunter +1"
Enhances "Despoil" Effect
SET: Augments Triple Attack
Raid. Poulaine's +1
AGI + 12
Evasion + 9
Enhances "Despoil" Effect
Ballerines
Haste +4%
Attack -5
Evasion +5
Waist
Crudelis Belt
STR +5
AGI +5
Enmity -3
Rings
Airy Ring
DEX +5
CHR +5
Earrings
Volley Earring
Racc +4, Stp +2
(credit to LordTrey for finding one I missed*)
As you can see, we've gotten a few nice accessories to tinker with as well as the weapon and armor upgrades. If anyone has any additions to this list feel free to let me know.
edit: removed velox's harness to end further discussion.
Edited, Oct 6th 2010 10:48am by Melphina

