Tom Johnson argues in favor of organization blogs. I blog myself (via MOSS infrastructure), but... no one reads me. Why is that?
My guess is that is for the very reason our occupation exists: people don't like to read (and write) more that they have to. So, I use my blog mainly for documentation release notes (posts like: GIFs for this manual are kept under this link).
But people on my organization do blog.
They post, and comment to other posts, sometimes as many as 10 posts a day, and numerous comments, as well.
Where so they blog?
Who's the lucky somain that get their attention?
Not at porn-for-the-developer-who-wouldnt-blog.com, of course.
They blog at the defect management application (say, TD/QC, and others).
They post defects, they fix defects, they contemplate on the right way to design and manifest new features, and they do it agily, on the spot, with remarkable results.
They don't call it a blog, so I don't interfere their work :)
As for me? I announce new publication there, as well.
As for my blog? It still contains (useful) lists of GIFs. (useful only for me)