TidBITS reports that Apple will allow virtualization of the Leopard version of OS X Server.
"Big deal. So what? Who cares?" you say. Well, this is the kind of thing that gets those guys who society rightly locks into server rooms all sweaty under their neck beards (neck beard jokes rule!). Now they can run multiple versions of Leopard Server on one box, alongside Windows and Linux. The Macalope, of course, knows several real Hydras (great dinner party guests -- all those heads and only one stomach), but this is the server equivalent.
Ben Rudolph of Parallels emphasized this final point, saying, "We're hearing from our customers - like you are from your readers - that the 'holy grail' of Xserves is to run multiple, isolated, near-native instances of Mac OS X Server on the same box, at the same time. If you couple that with the ability to run Windows and Linux next to those instances of Mac OS X, you've just made Xserves even more compelling for enterprises large and small, even non-traditional Apple shops."