Keep a history of reported nodes

Hi,
I'll need to modify this module a bit, as on our site users make reports but sometimes we just change a small thing on the node and re-allow it. We need to keep a history of the changes, of what was reported, as if we click "Allow" that report disapears from the list.

Maybe having a couple of checkboxes like "Reviewed" or "To review" would make the trick (as there are more than one admin reviewing the abuse list...).

Any ideas on how to do this? (or alternatives?)

Thanks