Randomize Default Cover Images

It would be great if administrators could upload a batch of various default cover images (lets say 12 for example) and have them randomly assigned to Pages (in my case, but could be users, groups, etc.)... as for sites with large directories it will keep page listings from looking repetitive/redundant. It's not entirely a cosmetic matter, but can help ensure the casual scanner of the page that there are in fact different listings.

Thanks for considering.