I read and philosophize about science more than I participate. I was web searching for more ways to contribute something anyway, while learning, and found Envirolink.org, an online environmental community. There are many links there to follow, so it looks like a promising source of interesting possiblilities.
Skylar Lab Weblog of Biology, Environment, and Philosophy has many contributors, writing on many topics. I came across it yesterday, and have found some of what is there provocative. The posts tend to be brief, and link to a lot more articles and commentary. Since I take not just one, but several both/and stands on the debate over the teaching of Intelligent Design, I found myself a bit impatient, after a short while, with the posts and articles there on that topic. Almost everything else I stopped to read brought me more questions – and I enjoy that.