Apple has removed the Boot Camp dual-boot utility from its pre-installed Mac OS X Server operating system.
Here's the knowledge base article:
Boot Camp is not included with Macs that ship with Mac OS X Server pre-installed. This includes all Xserves as well as Mac mini and Mac Pro configurations that include Mac OS X Server.
This is probably not a big deal for the big guys using Xservers, but Apple ships OS X Server on Mac Pro and Mac mini systems, systems aimed at the consumer market. This quiet removal of Boot Camp is unusual and could cause problems for some users.
It's certainly an unusual move for Apple to remove a feature, especially one so useful.