Not seen this before...might be useful to someone:
http://www.mamp.info/en/home/
"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!
Often sought-after and now available from webEdition Software, MAMP installs a local server enviroment in a matter of seconds on your Mac OS X computer, be it PowerBook or iMac. Like similar packages from the Windows- and Linux-world, MAMP comes free of charge."