NRC Handelsblad reviewing the state of blogging. She wrote an enthusiastic article a few years ago and it was about time for a re-evaluation.
A round of telephone calls made her realize, though, that blogging is out of date and is replaced by recent activities like Twitter and Facebook. But except in the world of science! There, apparently, the 140 characters are too few, and is Facebook considered too shallow.
The most remarkable revitalization of blog-activity, mentioned in Houtekamer's article, is the new network setup by Bora Zivkovic of Scientific American. But also The Guardian, Wired and the scientific journal PLOS recently started new blog networks (see, e.g., researchblogging.org, blogs.discovermagazine.com, scientopia.org or occamstypewriter.org).
Personally, I like the scale of a blog. Over time it builds up as an archive of smaller and larger ideas, and turns out to be a reference to topics that appear with a certain regularity in my classes; it is not uncommon that some blog entries turn out to be useful as a staring point for a larger project.
Nevertheless, lets see how all this develops in the next five years. New technology will surely suggest novel ways of doing and disseminating the doubts, failures and insights of science.