Any more than the current "quad"? *shrug*iLife '07, Mac Pro 2 x 4-cores ("8-core" is a misnomer IMO, but whatever....unless there's something I'm missing regarding Intel's CPU roadmap)
Remember the 20th Anniversary Mac. Out of most people's price range, it was a gorgeous machine. Of course, it was outdated technology the moment it shipped, basically (a Performa in nice clothing). But hey! It was used in a Batman movie! How great is that!
http://www.renewingmind.com/twentieth/twentieth_photo.html --- I think it's not very Ive. Ive does simpler things in my opinion.