TED: ideas worth spreading

TED (Technology Entertainment Design) is an annual conference with speakers from various fields, expressing novel/controversial ideas. This site offers an archive of over 100 filmed talks (adding more each week). Each talk is 18min long. Exciting stuff, I am spending several hours today listening/watching various talks. They are grouped by both fields (business, technology, arts, entertainment etc.) and themes (How the mind works, art unusual, the rise of collaboration etc.)