There is this new post over on Christian Stocker's blog today with a few comments on this: a post about building universal binaries with OS X 10.4 for PPC and x86 - so he gives it a shot with PHP.

It compiled and linked just fine, if it actually does work on a x86 box, I don't know. Looks like I'll know in a year or so. I'm not gonna pay 999$ just to find that out ;)

If you want to try it out by yourself, you need XCode 2.1 and the 10.4u SDK installed. The SDK isn't installed by default (at least not on my box), you have to choose it during the installation process of XCode 2.1 (which you can download on the Apple Developer Website, if you are ADC member, but that can be obtained for free).

Too bad he doesn't have access to one of those developer setups to find out - anyone out there ordered one yet?