If you are looking for a more robust way to preflight your documents than what InDesign CSx offers then this plugin fits the bill.
We needed something that would quickly show us the Effective resolution of images used in InDesign documents. We often work with FPOs from photographers, so we need a very fast way to make sure that we have replaced those FPOs with the High Resolution versions in our final documents
InPreflight allows us to specify whatever Effective Resolution we are looking for. We can set it to flag images with less than 300ppi resolution for offset printing, or less than 360ppi resolution for printing on our Epson 7600. We can also flag spot colors, RGB images, embedded fonts and many more options. Each set of variables can be save as a preset.
For the cost, we find this plugin very feature rich and an extremely valuable addition to InDesign CSx.
Radiance Creative Studios