It’s kind of funny to read things like this, from a Jan. 24, 2006 Wall Street Journal story,
While tech-heads have been using the method for the past year or so, tagging is now moving into the mainstream.
I don’t know if there were other services that allowed it at that time (and Lord knows I searched for them), but Macrobyte built an extensive, completely customizable tagging system into Conversant back in 2001. Conversant is the software that runs this site, and I’ve been extensively tagging all the articles I post here and at my other sites since then.
It’s nice to see the rest of the world finally catching up. And if you’re looking for a very forward-looking company for software development, check out Macrobyte.