Mine worked great (Zimbra OSS on openSuSE 10.2).
You need to make sure you do a couple of things to 'prep' the installation so it will run zimbra. First, be sure you have the latest release of ZCS, and be sure to update your system BEFORE installing ZCS.
I installed "Minimal Text Mode Only" with no extra packages except for fetchmail, cURL, libidn, GMP, compat-libstdc++. Do yourself a favor and DO NOT install a full graphical system. Runlevel 5 smokes resources, and ZCS can use all it can take. Be sure to split /opt off into its own partition (or seperate RAID array). Then follow the guide on installing ZCS on opensuse.