I'm voting for Solaris. I actually have no solaris boxes (though I think there are some sparcstations under the house
running. I'm actually wondering how many linux permutations are going to be required before we're all satisfied, indeed I think we never will.
Solaris is not just a different linux port, (eg ubuntu or suse), unix-like platform (freebsd) but also an entirely new enterprise-class community. Entering this field puts zimbra in an area with other competing collaboration software, not just exchange. I've yet to note anybody else making the obvious java connection with zimbra.
Personally I'm really interested in how the vmware/software appliance (SA) stuff is going, I think that gives users the flexibility of running whatever flavour they want, and just dropping in the SA as required. It's scalability is questionable because I would imagine cluster admins may roll their own more carefully, so I think SA is destined for small installations, but I could be underestimating the power of zimbra
dallas