Hey man,
Sorry but I cannot make out the IAT sensor in your picture. Easiest thing for you to do, IMO, is to go to the closest auto parts store and either buy (good idea if you work on ur own car) or even just look through a repair manual (preferably Hanes) for the section regarding engine emissions. I'm sure you will find a good explanation or even a picture of the sensor.

Or just ask around, especially at the auto parts store for someone with a "hooked" up Honda/Acura, and ask them if they know what it is and if they could show you. It will take them like 2 mins, besides maybe you can meet a new friend, hehe.

Hope this helps...
Later