It seems that the only way I could get RHEL 6 to register is adding the following to the kickstart's %post stanza:
rhnreg_ks --serverUrl=https://xmlrpc.rhn.redhat.com/XMLRPC --sslCACert=/usr/share/rhn/RHNS-CA-CERT --activationkey=<activation key>
However, this uses up a "Management" entitlement. How can I accomplish this without using up our valuable "Management" entitlement?
Side note: Anyone know of canonical documentation with regards to what these entitlements actually entitle you for?)