I guess I am morally obliged to point you to EveryONE, PLoSONE's new blog, seeing as I just joined the editorial board there.
Why a blog and why now? As of March 2009, PLoS ONE, the peer-reviewed open-access journal for all scientific and medical research, has published over 5,000 articles, representing the work of over 30,000 authors and co-authors, and receives over 160,000 unique visitors per month. That’s a good sized online community and we thought it was about time that you had a blog to call your own. This blog is for authors who have published with us and for users who haven’t and it contains something for everyone.