Long and short, the agreement they came to was...to agree to talk again and try to come to an agreement by 2015 that comes into effect in 2020 that will have less stringent requirements that Kyoto had.
All I know is, if Greenpeace is unhappy, I am happy.
As an aside, I have a hunch that 2020 date was chosen since are more than a few CAGW skeptical scientists who think we will have a 20 year plus negative trend in Global temperatures by that point, which I hope will be the case. If so, than the natural vs manmade climate change proportion will be up-ed, defying all current Global Climate Models.
Update: Interesting analysis of Durban here.