For a couple of years now I have been working with the parent company of Ethical Corporation on publishing strategy across our different businesses.
As a result we now have a variety of half-decent online publications with weekly newsletters.
Each has a weekly newsletter. If you'd like to keep up to date with developments in Wind, Solar, Tidal, SmartGrids, Electric Vehicles and so on, take a look at the links below.
Smart Grid Update - Yes it's about the smart electricity grid
Electric Vehicle Update - All about how EV's and infrastructure is being developed
Wind Energy Update - On offshore, onshore wind and operations and maintenance
Concentrated Solar Power Today (Think mirror farms, think "parabolic troughs", if you want)
Tidal Today (Tidal and Marine power)
Thin Film Photovoltaics (solar cell stuff)
Concentrated Photovoltaics (er, don't ask me much about this, but the site is good)