I managed to bootstrap and import OpenJDK into Fedora Enterprise Linux Extras for Red Hat Enterprise Linux 5, and hopefully it will hit the repo soonish.
Updated my Tomcat instance to use it was straightforward I did not encouter any problems. In case you do, please report any problems to https://bugizlla.redhat.com/
Until it hits the repo, get it from here http://buildsys.fedoraproject.org/plague-results/fedora-5-epel/java-1.6.0-openjdk/1.6.0.0-0.7.b08.el5.1/x86_64/
Source code to the entries and scripts that format this site are available on github. Text of journal entries is licensed under CC-BY-SA license.
Mail questions, comments and pizza to lkundrak@v3.sk