[T2] A Night's Profit (1.1) / intruder
[T2] Captain of the Guard / Random_Taffer
[T2] Escape Hammer Hill / DarthsLair
[T2] Settling A Score / eepcat

7/4/10:
[TDM] Thief's Den (re-release) / Fidcal

6/27/10:
[T2] The Body Snatchers (1.1) / Basso71

6/23/10:
[TDM] The Beleaguered Fence / Sotha

6/17/10:
[T2] A Visit For The Knights (1.1) / DarkMax

6/12/10:
[TDM] A Special Delivery / Silencium18

6/11/10:
[T2] When Still... / Eternauta

6/1/10:
[TDM] The Alchemist / Sotha & Fidcal

5/23/10:
[T2] 3 Distinct Adventures (v3) / Cardia1

5/22/10:
[TDM] Awaiting The Storm / HappyCheeze

5/19/10:
[T2] Darkstone Gem Part 1:  Looking For Info / Darkmax

5/19/10:
[T2] City Conflict V / Silencium18

5/14/10:
[TDM] Sound Alert & Blackjack Trainer / Dark Mod Team

5/8/10:
[TG]  Lighthouse Shed  /  Dront

5/6/10:
[T2] Insanity's Crescendo / Haplo

4/29/10:
[TDM] No Honor Among Thieves / Goldchocobo & Mortem Desino

For those having trouble with the above campaign zip, these are the individual missions:

Mission 1-Politics
Mission 2-A Night Out On The Town
Mission 3-No Honor Among Anyone

4/28/10:
[T2] Crooked Town (v2) / Ricebug

4/26/10:
[T2] After Dark / Shadowhide

4/8/10:
[T2] King's Story / Zontik

4/2/10:
[TDM] The Heart of Lone Salvation / Fidcal/Badcogg

3/31/10:
[TDM] Lord Dufford's / stumpy

3/20/10:
[TDM] The Builder's Influence / Railgun/Springheel

3/14/10:
[T2] Mine Saga / AntiMatter_16

3/9/10:
[T2] A Journey Into The Underdark / intruder

3/7/10:
[T2] Defense Assassination 2 / john-the-begger

2/28/10:
[T2] Garrett's Young Years XTra / zappen

2/27/10:
[T2] TafferPatcher / DJ Riff    (Note:  This is not a mission, but a utlity to patch Thief 2.  See TTLG thread here).

2/23/10:
[T2] The Mirror of Return (1b)  / PsymH
[T2] Down With The Mechanists / DarkMax