Treehugger made a review of the $5 book  how to build a solar home for $2000.    It is actually a solar cabin,  but once you see the one made by the author,  you might see that $2000 goes a long way.
Chemicallygreen talked about jathropa which is a plant that can be used to produce biodiesel.
The founders of wikipedia came up with a green wiki  called  Wikia Green.
Ecogeek blogged about UC San Diego planting solar trees.