Moldova is in (12 troops), but Tonga is out. Bosnia & Herzegovina contributed as many as 37 soldiers in theater, but Slovakia and Hungary have pulled out. El Salvador has stayed, but Nicaragua has gone. Australia, yes; New Zealand, not so much. Latvia, Lithuania and Estonia, you betcha; Denmark and Norway, gone. Mongolia is in, but Ukraine is out. It appears that Kazahkstan's 29 troops, and Armenia's 46, are hanging in there, but Thailand has left the building.
UPDATE: List of countries with troops in Iraq here and what is wrong with it (like many things in the Bush administration it is flat out wrong or dishonest). I wonder if Canada knows that they still have troops on the ground in Iraq?
Iceland has a single soldier in Iraq.