1. I don't have to remember to visit TED or subscribe to the RSS feed because people so regularly recommend it on Twitter and elsewhere that I wind up there often enough.

2. It has a fabulously ecclectic mix of engaging speakers.

3. I've said it before but I'll say it again: the media player rocks. Look at this:

I can watch the video on the page, download it to my desktop or to iTunes (this is new since I last visited), embed it in my blog and link to it. Now that's sharing.