Can't believe there are only 2 posts here.
I've tried to download and compile the components of a setup like this and it is difficult and time consuming.
Just downloaded XAMPP for Mac 1.0.1 and am having a few initial MySQL setup issues, but I'm sure it will take less time.
And when one of us needs to add another component, or make an upgrade, at least we can share our tips & tricks!!
Thanks to everyone who contributed. From coding, to bug reports, to troubleshooting, to helping others in to forums.
Well done, and keep up the good work.
UPDATE: MySQL problems overcome. Up and running on my old iMac G4 under 10.4. Thanks again!