The previous iteration of Building The Mac Office recommended Xserve server (soon to be discontinued) or buying the OS X Server and running it on any Intel Mac. But this year, it's impossible not to like the Mac mini with Snow Leopard Server as an off-the-shelf server option. Inside the tiny (7.7-inch-square, 1-1/2-inch-high) box is a 2.66GHz Core 2 Duo processor and 4 GB of RAM. It also comes with two 500GB full-speed hard drives and an unlimited client license for OS X Server, which supplies file and print, email, Web, and other services. At $999, why look further?