What replaces the Xserve?

Apple surprised everybody when it decided to discontinue its Xserve line on November 5th.  The company officially offered a faster Mac Mini and the Mac Pro, both with Snow Leopard Server installed, as the replacement of the Xserve. IT professionals who maintain data centers small and large claim that these aren’t complete solutions compared to the density of the Xserves. About a third of Xserve shops will be migrating to other hardware within the year.  Some Apple’s System Engineers assure that Apple has another solution in the pipeline beyond what they’ve announced.  Nobody knows what it could be, because Apple builds its own A4 processors, running in parallel, and a data center for cloud services.