Of all the people
who could create a Universal OS X boot disk (*cough* Apple *cough*), is anyone surprised that MacOSXHints (as
far as I know) got there first? Top it off with the fact that they also created a NetBoot image and, well... now
they're just making everyone else look bad (*cough!*).
This article at MacOSXHints describes the first half of the process - creating a Universal, bootable image of OS X - and it sounds pretty darn easy. The second step - enabling the Universal image with NetBoot superpowers - is right here. I haven't used either of these (since I don't have a shiny Intel Mac anyway), but they both sound like pretty simple little tricks. Enjoy.