The newest stable version of Zabbix is now 2.0.1. The current release 1.4.7 is about 4 years old. Helpful spec files can be found here: https://build.opensuse.org/package/show?package=zabbix-2.0.0&project=home%3Aericgearhart%3Azabbix They currently do not work due to a libcurl dependency mixup.
In EPEL6 there's at least 1.8.14, see http://koji.fedoraproject.org/koji/buildinfo?buildID=328195 but 2.0 would be nice to have.
Please see https://bugzilla.redhat.com/show_bug.cgi?id=867159
zabbix20-2.0.3-4.el6 has been submitted as an update for Fedora EPEL 6. https://admin.fedoraproject.org/updates/FEDORA-EPEL-2012-13423/zabbix20-2.0.3-4.el6
zabbix20-2.0.3-4.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report.