I was irritated by the amount of time it took to find anything useful, and by the haphazard tagging on some blogs. (Yes, I realise this is because I work in a library and I'm used to everything being "properly" catalogued!) It seems that good tagging is essential.
The Moonee Valley Library blog allows patrons to submit book reviews, which I think is a good idea.
http://mooneevalleylibraries.blogspot.com/
And this site from Christchurch NZ, has a great list of categories and tags.
