...the undersea power line from Iceland to Scotland before.
DanTysk is building a 99 mile submarine transmission cable to connect a wind farm off of Germany with the land. It's being put together by an Italian cablemaker, the Prysmian Group.
The lines will transmit DC electricity (which loses less over long distances than AC).
Other projects include Western Link, which will bring renewable energy from Scotland to England. Canada is building one to move hydroelectric power from Labrador to Nova Scotia.
As for the Icelandic link? Here's something as of last October.
Except for oil for transportation, all of Iceland's power comes from sustainable sources - and as electric cars improve in range, that might change. (They're also using geothermal electricity to create methanol from water).