I fixed the problem with various web crawlers trying to access non-existent rss.xml etc. files by adding the following lines to /etc/httpd/conf.d/wordpress.conf
Alias /blog /usr/share/wordpress
Redirect permanent /blog/index.rdf http://jumpgate.homelinux.net/blog/wp-rdf.php
Redirect permanent /blog/rss.xml http://jumpgate.homelinux.net/blog/wp-rss.php
Redirect permanent /blog/rss2.xml http://jumpgate.homelinux.net/blog/wp-rss2.php
Redirect permanent /blog/atom.xml http://jumpgate.homelinux.net/blog/wp-atom.php
Obviously you need to replace the hostname with something meaningful for your site. I thought this might be a useful addition to the RPM though.