I know that I'm kind of doing some Necromancy here, but I was looking for the solution to this problem and thought it would be nice to document the solution that I found here for any further searchers.

From the documentation at [AssetPostprocessor.OnPostprocessAllAssets][1] I have my C# script:

public class DetectChanges : AssetPostprocessor  
{

    static void OnPostprocessAllAssets (
        string[] importedAssets,
        string[] deletedAssets,
        string[] movedAssets,
        string[] movedFromAssetPaths) 
    {       
       foreach (string str in importedAssets)
       {
            Debug.Log("Reimported Asset: " + str);
         string[] splitStr = str.Split('/', '.');

         string folder = splitStr[splitStr.Length-3];
         string fileName = splitStr[splitStr.Length-2];
         string extension = splitStr[splitStr.Length-1];
         Debug.Log("File name: " + fileName);
         Debug.Log("File type: " + extension);             
       }

        foreach (string str in deletedAssets)
            Debug.Log("Deleted Asset: " + str);

        for (int i=0;i<movedAssets.Length;i++)
            Debug.Log("Moved Asset: " + movedAssets[i] + " from: " + movedFromAssetPaths[i]);     
    }
}

This helped my issue where I needed to know the Folder, filename, and the file extension of every file that is changed. Keep in mind that in order to use AssetPostprocessor you must include: using UnityEditor; [1]: http://docs.unity3d.com/Documentation/ScriptReference/AssetPostprocessor.OnPostprocessAllAssets.html