We had some really great threads last year, with the following four nominated for the Thread of the Year award in this January's Environment Site Awards ceremony.
Solar Energy ForumI have no doubt that we will be successful in harnessing the sun's energy.... If sunbeams were weapons of war, we would have had solar energy centuries ago. ~Sir George Porter
The people over at Voltaic have come up with a backpack with solar panels.
I can imagine this is pretty handy for re-charging digital cameras, mobile phones, etc. while on the move. At $229, though, it's not cheap... what do you think?
A company called Sollatek make a product called the glowstar which is a solar lamp, used a lot by people who go hiking, camping etc. Can also charge your mobile phone from it. Think it costs about $100.