@Craig_Matthews:My router keeps track of historical data volume in and out. When I turned on the 'backup to the cloud' feature, I expected to hear from Comcast's bandwidth police after a few days of sending that much data. The spike is still fun to look at.
What is nice, though, is that once it all shows up, CP only does differentials and it can do them during your off hours. If you don't throttle it and it kicks off during the day, though, you are going to be a sad surfer.