Intel is anticipating a move towards low-power microservers, and has announced a roadmap for its 2012 Atom range of CPUs that includes some sub 10W models. This is widely seen as a response to announcements from companies such as Calxeda, and a move by large internet groups such as Google and Facebook towards massively parallel low power solutions, more frequently ARM based.

For further details, see:

http://newsroom.intel.com/community/intel_newsroom/blog/2011/03/15/chip-shot-intel-outlines-low-power-micro-server-strategy

http://www.zdnet.com/blog/btl/intel-builds-its-microserver-arm-hedges/46136?tag=content;search-results-rivers