Which ethical saving / investment?

Most of you will know my ninja skilz with money. So I'm throwing myself on your Motley wisdom here: I have a bit of cash that needs to be squirreled away. I'm thinking an ethical 30-day ISA.

Ecology Building Society do one with instant access, 4.1% and a 1% bonus if you leave it alone; Triodos do a 33-day notice, 4.5% one.  What other savings / investment products are out there for this sort of sum and return?  I'm not averse to a little risk - is there such a thing as a green investment fund into which I could buy?  Is a grand worth the fees and faff? 

Help me, Obi Wodge, you're my only hope...