Apple published a list of improvements in the 10.4.4 server update where it says, that now you can use shortnames in the form of firstname.lastname to create corresponding email addresses. This is much easier than the former mail management using /etc/aliases to link users’ short names to alias names

Apple just published a knowledge base article that says that Mac OS X Server doesn’t support Intel chips yet. So if you plan to use one of the new Intel based iMacs as a server, you still need to wait for another Mac OS X Server update.

The latest Mac OS X Server update to version 10.4.4 solves two issues with the default PHP/MySQL installation in Mac OS X Server. Older Tiger server versions used different sockets for PHP and MySQL, so you had to tell one of the applications to use the socket of the other