I've seen a few GMs with campaign blogs around, but I don't ever recall seeing a multi-author campaign blog involving all the players - where they can post background snippets about their PCs and what is going on in-between sessions.
Such a thing seems like a good idea, though. Is this something that is around that I just haven't seen? Or is it something rarely done...?
I've seen campaign wikis, but the learning curve on a wiki can be steeper than that on something like Blogger or Wordpress... and, really, the time-sequential nature of a blog seems like it would be more appropriate for most campaigns.