I started blogging on November 18, 1997. Here's my first post, "If it looks like a duck, and quacks like a duck, it's probably Stan." Kevin Karlson.
Archived here.
I was a producer for the Karlson and McKenzie morning radio show in Boston on Eagle 93.7.
At that time I didn't have any blogging software so I hand coded the page that was in reverse chronological order with permalinks to each item.
I started using blogger on Thursday, November 09, 2000 over here with this blog, Off On A Tangent.
I started videoblogging at Steve Garfield's Video Blog on January 1, 2004 with this post, 2004: The Year of the Video Blog.
I missed noting it on the exact day, but I've been blogging now for over 10 years.