Apple's Mac Mini Server More Cost Effective Than PC Servers
Did you know that Apple has released a new, compact, inexpensive server that runs Mac OS X Snow Leopard Server? With the splash created by Apple's new Magic Mouse and upgraded widescreen iMacs, the new Mac Mini with Snow Leopard Server has not gotten its due press.
For the low, low price of $999, this new gem offers the following: two 500GB, 5400 RPM 2.5" SATA hard drives; 2.53GHz Core 2 Duo processor; 4GB of 1066 MHz DDR3 RAM (expandable to 8GB); a 6.5" square, 2" high Mac Mini enclosure, weighing just 2.9 pounds; and an unlimited user version of Mac OS X Server. Wow.
AppleInsider compared the Mac Mini Server with PC servers and (as illustrated below) found that it costs roughly one-third of the PC servers, while offering more features (and of course being more stable). "Prior to Snow Leopard, the unlimited user version of Mac OS X Server cost $999; that's what the unlimited user version now costs with the Mac mini server thrown in for free."

You can read much more about the new Mac mini server and the comparison with PC servers here.
Source: "Inside Apple's New Mac Mini Server" by Daniel Eran Dilger, published at AppleInsider. Thanks also to Jeffrey Kabbe's post about this topic at Apple Briefs.