Well, the thing is that N8x0 are not phones, and SHR is mainly phone distro
But of course it can be built for N8x0 - we need some maintainer to do that, as we don't have any of those devices. If you (or someone else) want to do that, then you're welcome! How to build SHR is explained on our site, OpenEmbedded has support for nokia800 machine, booting it shouldn't be hard.