If the Chromium builds that Johnny packaged still work, those are what you'll want to use. There may be a more recent source than is detailed here however: http://lists.centos.org/pipermail/centos/2013-June/135238.html
http://www.if-not-true-then-false.com/2013/install-chromium-on-centos- red-hat-rhel/
Are these still being built / maintained? The last version I have is 28.0.1500.95. I'm sure Johnny has better things to do. He mentioned that at some point it might not even be possible to make new builds.
Thanks,
Josh