Mac OS X Server harnesses the power of many of the top Unix and open source web and Internet presence tools available. It includes powerful web, email, blog, and FTP servers as well as a private instant messaging system based on the Jabber project. This makes it a great platform for managing your entire Internet presence, which is great news if your company develops and hosts Internet content or if you have a need to manage a great number of mailing lists and email accounts. The built-in FTP server is also great if you want to allow clients to upload files to you for processing (particularly if you’re handy at automating Mac OS X and want to have some of that processing done automatically).
If you just want to have a website and a few email accounts for employees, however, you’ll probably find it easier and cheaper to hire a company that specializes in web hosting. Most businesses with fewer than 50 staff members can get a decent web-hosting package that includes email for $10–$20 per month. You’ll often still get as much control over your web content as you could possibly need and you’ll get it with technical support and without the potential of overburdening your Internet connection. If as you grow you want to develop an intranet for an internal web page (or web-based application) and messaging, you might find a balance between both internal servers and external web hosting.