Has it really been that long? I guess it has. The Official Google Blog shares the news that the @Google Talks team posted its 1000th video. What a milestone! The list of visitors that have participated in @Google Talks is indication enough of just how relevant Google is, in so many areas of current knowledge. You can check out all 1000+ videos on the official @Google YouTube channel.
So many great talks, it would be so difficult for me to pick a favorite.