10 measures to prevent your Wordpress blog from being hacked
mytestbox.com
mytestbox.com
See:
http://secunia.com/advisories/search/?search=wordpress
http://milw0rm.com/search.php?dong=wordpress
I don't currently run a self-hosted blog, but if I did, I would at least try to make sure the one I was running didn't have any new vulnerabilities.
Secutiry should be taken seriously for any website, not just for Wordpress...I bet there are security holes in Movable Type or Textpattern or other blog software...that doesn't mean we should stay away from running blogs...because that means we will stay away forever.