Sort of. Macworld UK:
So how does the latest Mac mini Server measure up, and can it be considered an enterprise-level replacement for the now-defunct Xserve, Apple’s rack-mount server?
In answer to the latter, Apple stresses the ‘personal server’ aspect of the Mac mini, describing potential uses in small businesses, classrooms, design studios, and so on. After all (for the time being, at any rate) for the bigger players there’s still the Mac Pro Server which, at a basic price of £2,450, comes in at almost three times the Mac mini’s £849.
I still lament the cancellation of the Xserve hardware. Rack mounting a giant Mac Pro server seems like overkill.