Mostly book reviews. Very rarely I'll allow William Campbell Powell (author) to write a blog entry on publishing activity, but he's under orders to keep that stuff over on his Facebook page and on http://williamcampbellpowell.com
As an author I detest the idea of a link tax as it seems to me to apply to the book blogging community. As I read it - and correct me if I'm wrong - a blogger can be charged for linking to other sites. And on the other, because a review can earn money if people link to it, there's an incentive to write a positive review, so that authors and their publishers will link to it, which destroys the impartiality of reviews. There's another word for paid reviews - it's called advertising.
If you agree with my interpretation of what's proposed, time to click some links while they're still free.