We started on April 1, 2003. So long ago, you couldn't watch video in a web browser; you had to watch it in a different player, like in Quicktime player or something like that.
I still blog, but I do think blogging will become obsolete, as there are more ways of interacting on the Web with low barriers to entry for people to engage and participate.
You can be in Ohio and shoot your own web series, if you want. If this had been around when I was in high school, I can guarantee you that my friends and I would have been shooting our own television shows and putting them online and trying to get as many hits as possible.
There's a lot of information that has been in peoples' heads and hasn't gotten onto the Internet. Even as the Web has gotten really big, there's just been this gap. So we made Quora as a general place for people to share knowledge of all kinds.