Adding a bit of uncertainty to what exactly Apple is doing up in North Carolina with two (maybe three) datacenters, it’s now public on the Apple website that after January 31, 2011, you’ll no longer be able to purchase an Apple Xserve.
Maybe it’s because of the datacenters, that Apple cannot keep their own internal systems online and still sell the servers at retail? Doubtful. Apple is suggesting administrators transition over to either Mac Mini or Mac Pro based servers. Neither of which are particularly rack mount friendly.
It’s just hard to imagine Apple doing any sort of massive datacenter project and fill it with such inefficiently designed server systems, yet it’s equally hard to see an Apple datacenter with Dell or HP systems. I’m sure they have something interesting up their sleeves and maybe will be releasing a new server lineup down the road.