Via this pointer from Nexen.net today, there's information about a new a new Apache/PHP/MySQL package for the OS X crowd - MAMP.

The abbreviation MAMP stands for: Macintosh, Apache, Mysql and PHP. With just a few mouse-clicks, you can install Apache, PHP and MySQL for Mac OS X!

MAMP is installed in the typical Mac fashion: very easily. MAMP will not compromise any existing Apache installation already running with your OS X. You can install Apache, PHP and MySQL without starting a script or having to change any configuration files!

What's more, if MAMP is no longer needed, it is sufficient to delete the MAMP folder and everything returns to its original status (i.e. MAMP does not modify any of the "normal" OS X).

Sounds like they've got the Mac way of doing things down, and the idea of being just a few clicks away from a running server is definitely appealing...