Wow, fantastic stuff, and a great antidote to some negative views I tend to hold about the Greens (even though I've often voted for them). Some comments:

1. Working out what to do is an engineering problem. It is easy to be swept along by fine words but we need a big team of engineers and scientists working out (and continually reevaluating) what can be done, what order things need to be done in, etc. And we need ball park numbers that can be argued about. We can't afford too many more dead ends like the Hydrogen Economy and biofuels.

2. The amount of money under discussion is way too low to make a dint in the insufficiency of demand that we are going to see in this monster recession. Also with deflation raging there may be no need to borrow the money from the market, we can just print it. Admittedly this is not the sort of reversible injection of money that one would prefer, and might cause inflation later. Paul Krugman has been saying we shouldn't worry about that now.

3. The private sector is not functioning. This is socialism's hour. We need to nationalize activities, fix them, and sell them later, as Mike Moore has said about the US car industry. That's not to say we shouldn't have competition. Let's get multiple teams working on the same problem, at least in the early stages.