Here's the TED we watched yesterday:
http://www.ted.com/talks/david_mackay_a_reality_check_on_renewables.html
Here's the TED we watched Today:
http://www.ted.com/talks/donald_sadoway_the_missing_link_to_renewable_energy.html
Here's the TED we'll watch tomorrow:
http://www.ted.com/talks/amory_lovins_a_50_year_plan_for_energy.html