Debian has always supported a wide range of processors, though; these architectures are different and noteworthy because instead of providing Debian on different hardware, they build the OS on a completely different kernel: FreeBSD’s. More here
The FreeBSD-based ports are sorted in with the distributions for the various processor architectures Debian supports. So far, only 32-bit Intel and AMD64 chips are supported, designated kfreebsd-i386 and kfreebsd-amd64, respectively. Both are still undergoing development, and not yet ready for installation.