Bertram's vison, called Ozzo, uses the HotColdFrozenData concept. Hot data, in continuous use and stored in a location near the user for quick availability, will be powered by solar energy. Cold data, which is accessed and rarely modified, will be powered by wind energy. Frozen data, rarely accessed or modified, will be powered by free cooling and electricity generated by biomass.
The data center is the site of many innovative thoughts to reduce energy spending. Arthur Cole recently commented on new but challenging cooling strategies at IT Business Edge. Julius Neudorfer discusses the green data center movement as he witnessed it at the Uptime 2010 Symposium over at CTO Edge. A number of tools to determine green data center saivngs can be found at the IT Business Edge Knowledge Network.