As an idea, I'm wondering if you could also add information for the average click-through rates for each ad type?
Currently we don't save individual clicks, so cannot determine average CTR for last day, however it is possible to calculate average CTR for all time:
468x60: 0.0624%
160x600: 0.0354%
250x250: 0.1475%
P.S. When I will have more free time (in June probably), feature set will be significantly extended.