http://www.raspberrypi.org/archives/3685
As of 9 April 2013, a total of 150 Raspberry Pis steadily used 4.5 Amps on average and about 1 TB of bandwidth last month. Now, most of them were only placed a few days or weeks before, so this may not be the most accurate picture ever; however, it does give a general idea on how they perform. Oh well, I guess we’ll just have to follow up on this post in the future!
Some pictures:
150 Pis:
