I would suggest paging through these twitter search results & click on a few urls: http://search.twitter.com/search?q=%23cop15+cli...

It looks like folks are latching onto breaking news that revolves around international agreements & updates on US involvement in global initiatives.

The comments on these stories may give you some of the insight you're looking for

You can check the following blog contest platform aiming towards COP15.
http://climatechange.thinkaboutit.eu/

This competition involves 92 bloggers from 40 countries. The amount of articles and comments are pretty overwhelming, but definitely a good resource when covering about blogsphere/ citizen journalism type of activities surrounding around climate change discussion.