There was a new release of syslog-ng OSE 3.3 last weekend, it's now at beta2. FreeBSD ports was the first to add support for it, and now here are the openSUSE packages for testing: http://download.opensuse.org/repositories/home:/czanik:/syslog-ng33/ or if more interested in package sources, then check https://build.opensuse.org/project/show?project=home%3Aczanik%3Asyslog-ng33 where these packages were built.
Systemd support is being reworked in openSUSE, so please stick to sysvinit (which is the default) when testing these packages. There is one known problem affecting functionality: mongodb support is broken. It's already fixed in git, so it will be part of the next release, or if there is a request for it, I can add the patch to the beta2 package.

I just found a nice introductory article about syslog-ng at Linux Journal, which describes the basics and also some more interesting topics and provides good explanations. You can read it at http://www.linuxjournal.com/content/creating-centralized-syslog-server It was written on Debian, but most information should apply to any Linux distribution.

-- 
Peter Czanik (CzP) <czanik@balabit.hu>
BalaBit IT Security / syslog-ng upstream
http://czanik.blogs.balabit.com/