Two items today that aren't about social media but I learned about them through social media:
I want my hydrogen car. Yeah, there's a ton of work that has to happen but this is really going to create so many economic opportunities in the long run it's worth it.
(hat tip: Treehugger, which gives some great commentary.)
And a nice list of blogs that cover hydrogen vehicles can be found here.
Also, the Boston Globe has an audio slideshow about Dream Chase Farms, a thoroughbred rescue home founded by the Globe's former movie critic. It's located in Georgetown, Kentucky - just north of here.