I've added a couple of extra 'worthy blogs' to my list (on the right there).
The first is A new nature blog by Miles King. The second is from George Monbiot.
Both are thoughful (and thought-provoking), taking blogging to very high levels indeed. If you want to look deeper into our natural world, the movers and shakers (and destroyers) then take a bit of time and have a look. You won't be disappointed. They both show my stuff up for the fluff that it truly is.