Facebook vs. Personal Blogging

So, I was reading a post about the possibility of Facebook killing personal blogging. I've never really been a big social network person, and most of my friends are either on Livejournal or Wordpress.com. But a fair percentage seem to have a profile on MySpace or Facebook, if not both.

I have a Facebook app that pulls headlines from my RSS feed, but that's about as close as I get to blogging on a social network. Maybe it's my group of friends, but social networks have always seemed closer to IM or IRC than blogging. There's banter and most conversations aren't started by the profile owner. And we do silly things, like recruit each other as vampires or pirates or use Super Poke. More substantial subjects tend to stay on our blogs and off of Facebook.

I have to wonder if it's not so much Facebook is killing personal blogging as what's categorized as personal blogging just never was a great fit for blogging. If something that's a better fit comes along, it makes sense that people would prefer that.