Basically right now noone knows for sure. The "quality" of most of these blog posts out there saying it will or will not work rivals the blog posts promising an HDTV Mac and other nonsense rumors at MacWorld. In other words, it's just people talking with no actual facts to drive traffic to their site and earn a few bucks on Google AdSense.
Odds are, in about a week or two, someone will have a solid procedure that works for booting Windows XP on a Intel based Mac. Even if it takes some hackery with Linux boot loaders and how the disks are partitioned, someone will find a way.