As a very satisfied CloudFlare customer (read "leech", since I'm using the free tier), I have seen your dashboard serve 300 GB of data for me some days, which never reached my server because of caching. It would be nice to be able to see a list of the ten most bandwidth-using URLs for a period, so I can maybe save you some bandwidth in case it's an attack or something similar.
Currently, since I use caching, I never see what consumed the bandwidth, so I don't know what file people are downloading so much.
(P.S. Hey David, long time! I hope everything is going well)