Is there a way that when you double click the Texture Image node it pulls up the file dialog in the place where the loaded image is? Meaning, not the default location but where ever the image that is currently loaded is? I load up different textures to see how they will look in the scene and once I see them don't always like the result so I go back to my library (deep directory structure) and pull another image. Would really speed thingss up for me and I'm sure a few others...
Of course before anything is loaded into the node it would be fine to pull from the last place or the default location.