Hiya - I know that I can create a "most commented on" list of entries in the side bar, and likewise a "most popular" based on various plugins. But what if I want it to reset weekly? Is this possible?

So, specifically, let's say I want this thing to run every Friday and show - the 5 posts with the most comments that were made during the preceeding 7 days, as well as the most popular during those preceeding 7 days....

Any clues how to make this happen?