Although this is now my 'real' blog, I started blogging elsewhere, on Nature Network (and I still occasionally post here at my old blog, where it's a purely sciencey topic). Nature Network is an excellent environment for people in the science arena to share information, set up by company behind the world's leading science journal.
However, recently, a Nature Network blogger has been censored. One of his posts was pulled by the management. Ironically, it was a post that was inspired by the current attempt by the British Chiropractic Association to sue Simon Singh for libel because he referred to a claim as bogus.
I have seen the original post, and I can see why the management was nervous. It mentions several individuals, mostly big name scientists, who are either trading on their name to make money on products that make dubious scientific claims, or leading people astray (in the blogger's opinion). However, it's worth saying that the suggestions that worried the management have all been made elsewhere (one of them on this blog), especially on Ben Goldacre's excellent Bad Science blog.
On the one hand, I can see that the management at Nature Network don't want trouble for themselves or for the blogger in question - but equally this seems to play into the hands of those who want to use the UK's outrageous libel laws to suppress science and personal opinion. There is a campaign to get this changed - you can sign a petition to this effect and read more about it here.
If Nature Network's actions interest you, you can see the reactions of the bemused blogger here, the response of the NN management here (and it's rumoured you can see the original post here).