From Envirowiki

United Nations Climate Change Conference 2009, or Conference of Parties to the UNFCCC #15 (COP15), is being held in Copenhagen, Denmark, from November 30 and into December, 2009. COP15 is a major meeting, as the targets for the post-Kyoto period will be agreed upon.

The Rising Tide network has put out a call to action at the summit: http://risingtide.org.uk/copenhagen

The summit will be working with a new group called the "Climate Consortium", which is a think tank made up mostly of businesses.

The summit itself is to be held in the main Copenhagen conference venue called Bella Center, about 5 kilometers from the city center.