As mentioned here before, even with EFI support in existing open source tools, getting the new MacIntels to boot something other than OS X has proven tricky.
Linux support will eventually happen for the new platform (and related hardware in the new machines), but I'm not sure Red Hat will be the first distro to achieve that. As always with Linux and BSD, flame wars descend over which flavor is better. The reality is that I use different distros for different uses/machines. Anyhow, a Linux distro on a new Intel Mac may end up being many Linux distros once the bootloader troubles are resolved.
[via Ars Technica]