I just would like to know if this is possible for hfs+ and for the new EFI implementation of OS X.
Thanks in advance.
I doubt it. At least not without writing some code to support loading the osx kernel. elilo is a *linux* boot loader, and only knows how to load and execute the linux kernel.
But hey, if you have one of those machines, feel free to update elilo to boot osx and send in a patch. (or better yet, send the patch, and send me one of the new apple machines so I can test it ;)