Updated and brought forward so it doesn't get lost in the ether.
My stuff
Have
Beatles Rock Band
female avatar shirt
Gears of War 2 Flashback Map Pack
PAX 09
female avatar shirt
x2
Scrabble (US ONLY)
Seattle Sounders
female avatar shirt
Sherlock Holmes
female avatar shirt (US ONLY)
Xtival
male avatar shirt
x2 (EUROPE ONLY)
Paypal (but I'd really rather trade)
Also, a PSN code for
DJ Max Fever on

, worth $20 I'm informed. I'm led to believe it's US-only.
I also have two :win: codes for Order of War Challenge via Steam.
Want
Avatar items
Borderlands Content
DLC
Mass Effect 2 Armour (Terminus, Inferno, Collector + guns)
Microsoft Points
XBLA
Do Not Want
Crap
Played Games
48hr Trials - They only work for Silver members so are useless to me
Fallout 3 DLC - Got it all with the GOTY
Gears of War 2 maps - I have them all
Halo 3 or Halo Wars content - I have it all
Rock Band or Guitar Hero songs - I don't have the games (yet?)
South Park DLC - Got it
Timewasters
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Friend's stuff
Has
Banjo-Kazooie
Brütal Legend Tenacious D Guitar
Call of Duty 2 Skirmish Map Pack
Call of Duty 4: Modern Warfare Variety Map Pack x3
Gears of War 2 Flashback Map Pack x6
Halo Wars Fireball Warthog x5
48hr Xbox Live Trial x30+
1 Month Xbox Live Gold
Wants
Offers
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DISCLAIMER
As far as I'm aware, most Xbox Live MSP, Time and Originals codes will not work across regions, however content such as Arcade games and DLC will, with the exceptions of Bejeweled 2, (allegedly) DOOM, UMK 3 and Puzzle Fighter (due to the UK database being silly).
Some Amazon codes can be difficult to work with too, although a dummy US account circumvents the problem for arcade games.
Also, I've observed that codes for one month can usually be internationally redeemed.
Unless otherwise stated, codes are believed to be region free.