Okey, i just read one article here about same topic and as i understand in CS4 it wasn't posible (meaning automaticly throught preflight).
How about CS5?
Both CS3 and CS5 let you preview CMYK page items that exceed a chosen total ink amount from the Separations Preview panel. I don't see any reference to total ink in CS3's preflight menu.
I was found it. Don't remember right now where but there was such thing. Not so obvious but it was posible to add option for checking and find in object list total ink for image. I think same was for stroke and fill color max ink. But that was in CS3. I can find it later (some days) if needed.
Separation panel is excelent thing but since it depends on human eyes it's not so "cool" better for workflow would be to make Indesign do that work.
P.S. Oh my...i feel so ashamed. That was acrobat preflight. Sorry sorry sorry.