Christian Anthon>
Centos-6 compatible packages are available from the official sudo webpage. It's a later version of sudo and I'm not sure if that will cause problems. I've tried installing it and so-far so-good.
One minor problem - if you have sudo configured to use LDAP (using /etc/sudo-ldap.conf), then upgrading using the sudo.ws RPM will rename /etc/sudo-ldap.conf as /etc/sudo-ldap.conf.rpmsave and stop sudo working with LDAP
Moving the original /etc/sudo-ldap.conf back fixes this - but it's a pity the sudo.ws RPM doesn't provide /etc/sudo-ldap.conf as a config file - which would prevent this happening
James Pearson