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Hey there! That is a good idea. The most you can do now is export monthly and weekly report form our Reports tab in the web app. You could compare them from there also. We have some great documentation on custom reports here: http://www.seomoz.org/help/custom-reports

Good answer Doug! Regarding the Ranking Factors, is there an ETA yet?

Makes me feel better I wasn't the only one! Glad it helped clear things up for you too