More blogs....

I forgot to mention that in fact my own library has a blog! It's at http://contedlibrary.blogspot.com/
It's used to update readers on any important information, like changes to opening hours. We have an RSS feed so that news items appear on the library web-page at http://library.conted.ox.ac.uk/ - clicking on a "headline" takes you through to the full post on the blog.

I've been having a look at a few other library's blogs. There is a mixture of time-limited information (like upcoming WISER courses), information which is new but will stay relevant (like availability of new resources) and reminders of information which isn't time specific at all (like resources we've had for years but which readers may be unaware of). I think given the chronological organisation of blogs, it does make more sense to use them for the time-specific information. They're not a great way to store information in the long term, unless you have a very sophisticated tagging system, but they are useful for updating people about information as it comes up.