I went over to their site and they have expanded the offerings, including a SuSE build.  I went ahead and downloaded it.  However, after reading through the first part of the install instructions. it indicates you cannot have any other copies of the supporting programs running on the Zimbra "box" - MySQL, Apache, etc.

That pretty much precludes me from testing it on my server as I have all those running already for different purposes.  That seems like a pretty bad limitation on the part of the Zimbra folks - you either have to have a dedicated server or I suppose a dedicated vm.

I do have a spare box sitting in a corner.  Wonder if I could get it up and running and attached to the network for some testing?  Maybe I'll give it a try.