Two new architectures based on the FreeBSD-kernel have been added to the Debian Archive. This makes Debian the first distribution, and probably the first large OS, to support two completely different kernels at the same time. "The two new architectures (well, better named OS i think, as they use a different kernel) are available in unstable and experimental. We do start out empty, importing only what is needed to get a build running. For this reason you will not be able to directly use it immediately. Please wait until they catched up, which I expect to happen soon."