Mac OS X Server version 10.4 (codename Tiger) will feature a weblog server.
The Weblog server provides users with calendar-based navigation and customizable themes, is fully compatible with Safari RSS and enables posting entries using built-in web-based functionality or with weblog clients that support XML-RPC or the ATOM API. The Weblog Server, based on the popular open source project “Blojsom,” works with Open Directory for user accounts and authentication.