We've covered the appeal of hydroelectric power for ICT since 2009, when we noted the attraction of low-cost, low-carbon hydro in the United States' Columbia River Valley and other locations. We continue to see more hydro-powered ICT emerge around the world.
Facebook sited a data center in Lulea, Sweden based on plentiful hydro for power and Arctic air for cooling.
Yahoo sited a data center in Lockport, NY-USA based on hydro availability, reported to be ~15 MW.
Canada's Green Star Network also incorporates hydro-powered nodes.
We'll update this post as more ICT becomes hydro-powered.