+100 for companies providing services that are reasonable sustainable and have a track record of supporting low carbon legislation/initiatives (not very many on the top 50 list)
+50 for companies that are doing more good than harm through investments and/or lobbying
0 for companies that are neutral (either with a business that is not really pushing in any direction or a company that do as much good as bad)
-50 for companies that are starting to move in a more low carbon direction and/or doing some lobbying in support of a low carbon development. But where the majority of the business is still in a high carbon area and the majority of investments still go in a direction where they lock us into a structure that making reductions more difficult
-100 for companies that still investing in high carbon solutions and either blocking or in other ways trying to stop rules and regulations that support a low carbon future.
Looking at top 50 I get the following list (based on my knowledge on the companies and rather giving a good score than a bad, so in reality we might be a little worse off, but as the rhetoric is carbon friendly in most cases I think we can get a momentum as soon as the biggest obstacles are out of the way) :
2 Companies +100
2 Companies +50
17 Companies 0
17 Companies -50
11 Companies -100
This would result in a 2008 Future/Fossil Power index of: -33
So we still have a long way to go, and I hope to follow-up this next year. Hopefully with a much better score.