I like alex's idea about the column for images, for checking attached album art that would be very quick to see. This prolly the only time i would really want to see them tho.
But maybe it's quicker to make a smartlist that can show missing image file instead for this purpose.
Hammer's idea about the dot's is interesting and i would like to take that a bit further, allow user configurable art to be used in this case.
Hammer mentions red, blue, yellow dots
red = missing
blue = ok
yellow = not imported
or a simple mapping table
this would be incredibly helpful to make graphical indicators of various states instead of having to read the state itself.
how many times do we hear ppl wanting to use
another column of stars only to be told that it's not possible
Tho this is taking the idea even further in the sense the custom field can now also
accept user input instead of only passively displaying state info.