
You can watch any or all of them for free. The presentations are interactive if you're able to tune in live, and will also be recorded if it's more convenient for you to watch them afterward on-demand.
I have embedded one of my favorites below and you can peruse the full program here: BrightTALK Green Week
You can watch the presentation below from this page via the embedded BrightTALK player.The webcast has already been summarized on Contagious.com and features:
Rich Lechner, VP, Energy & Environment, IBM
Will Swope, VP & Managing Director, Intel
Amy Skoczlas-Cole, Director, eBay Green Team
Andy Bateman, CEO, Interbrand