The eframe is working well with MorphOS 2.4 since a few months now. One of the main purposes of the project was to have a device that consumes very low electric power.
Over the last few years many things on other architectures have changed and improved a lot, too. But the eframe still is pretty competetive in the power uptake regard.
Usually it consumes a bit less than 30W, when the display is switched off the power uptake can go as low as 12W. With an exchange of the hdd with a flash memory the uptake should be able to get reduced once more.
Strong competitors are the Atom netbooks of course. They can beat the power uptake of the Efika on average usage, but the minimum value is still on par.
Not too bad, considering that the Eframe neither uses a mobile gfx chip nor a special power saving display.
read all my measurements for a couple of computers here:
http://via.i-networx.de/bench_en.html#uptake

Low electric power still is a power of Power!