A presentation by Martin J. Levy of Tier1 Research and Josh Snowhorn of Terremark on Datacenter Power Trends - NANOG 42 Power Panel at the NANOG 42 meeting discusses colocation centre problems, how these came about, what is expected to happen, and how colo is considered the bottleneck of the Internet. As cited from the Gartner Research in 2006, "some organizations are in the unenviable position of paying more to power and cool a rack a servers than they paid for the rack and the servers themselves. Clearly things are moving out of balance." Case studies and possible solutions to these datacenter problems are also included in the presentation.
Read the full presentation here.
More on the NANOG 42 meeting here.