X PHP
I just found this WebMonkey article on how to correctly configure and install PHP as a DSO for OS X’s built-in Apache installation (which requires an update). PHP actually works for me now (yay! on a Mac!), but my previous MySQL install was a little screwy. Still working on getting PHP + Apache + MySQL to work together flawlessly, but now I’m much closer. The article also lists a place to get real OS X 10.0 (not PB or Rhapsody) packages for PHP, MySQL, PostgreSQL and others.