Mactels and linux?

Just a hypothetical question, not like I have one already, but what kind of Linux support is there for the new Macs with Intels? I mean, does anyone know exactly what architecture these things have, and how easy it would be to port it?

http://www.pcworld.com/news/article/0,aid,124370,00.asp

has a little info, but not much.

poly-p man
.