Mac OS X Server is based around open standards and includes a range of enterprise-grade technologies that offer a host of powerful and flexible features: Open Directory (a scalable directory service based around OpenLDAP and Kerberos) established Internet hosting platforms like Apache, BIND for DNS hosting and Dovecot-based mail service collaboration tools based on open standards like CalDAV and CardDAV a range of deployment and client management tools and powerful multiplatform file and print services. I'm a big fan of Apple's server platform.
When Apple announced the server edition of its popular Mac Mini late in October, I was excited that the company was finally offering a low-cost small-business server at a terrific price point ($999) for both the hardware and an unlimited license of Mac OS X Snow Leopard Server.