If you don't know about TED, you should. If you want to experience TED, TEDXSydney is on this weekend - you can go to the Carriageworks, or view the live webstream. Brief talks on a fascinating range of subjects from an extraordinary range of speakers.
TedXSydney has the program and all you need to know. If you want a flavour of TED, click on the TED tag at the end of this blog entry for some earlier entries where I've highlighted TED resources for schools.