Red Hat's Adrian Likins has released another test build of up2date
As often as I can. These are for testing purposes only and unofficial.Read more
add:
yum up2date-test-repo-severn-i386 http://people.redhat.com/alikins/up2date/severn/RPMS/
to /etc/sysconfig/rhn/up2date to get to these with up2date. (note some versions of up2date out there might try to automatically update to these versions if you add that, if you dont want that, you can either set updateUp2date=0 in /etc/sysconfig/rhn/up2date) or just grab the new packages which only auto update up2date if it's from an rhn channel).
And for added fun, you can try testing rollbacks.