They do a great job of pulling resources from all over the web and often have compelling content. It's a great site to check regularly.
Yahoo! Green Reviews
Pros: lots of different sources in one place
Yahoo Green is a good resource. It's got lots of blogs on environmental subjects all in one place. From EcoGeek to Climate411 to Huddler! It's a useful place to look for the latest green news, opinion, and information.