I'm off to Big Green Gathering - any recommendations?

I'm off today for my inaugural visit to The Big Green Gathering. Any recommedations for must-see talks, people or acts? I confess we're travelling by car, though it is a car club one, plus there are four of us and enough camping equipment inside to open our own Millets store. If all goes according to plan, I'll be posting some photos of the festival over at Newconsumer.com this weekend. [Photo: gavinandrewstewart]