Blogging Anonymously

I’ve decided to start a blog, and I’ve been doing some research on blogging anonymously. The domain is privately registered, and I followed this tutorial on setting up Tor with Firefox and it seems to work quite well.

http://ethanzuckerman.com/blog/?p=1015

My questions involve using a WordPress installation on a paid hosting account, since the paid hosting is registered under my real name Is there any way that the installation of WordPress can be traced back to me? Does the installation record any personal information from the hosting company or from my personal computer that could be accessible to outsiders?