Someone recommended me to this today, and I thought it was really great. It's a very motivating video from a Web 2.0 conference in 2008 on getting your site going. While it's not a technical video, it is still worth watching.
[yt]http://www.youtube.com/watch?v=EhqZ0RU95d4[/yt]
[yt]http://www.youtube.com/watch?v=EhqZ0RU95d4[/yt]