Due to new licensing information in this post, I cannot re-distribute the spotify client. Although this might change, this is the current situation. Besides that the rpm cannot be part of rpmfusion for these reasons, it also means modified instructions to build the rpm manually:
Since the Debian/Ubuntu repo only contains the latest version, the spec file needs to be updated each time a new version is released. The current version, 0.8.8.323.gd143501.250-1 doesn't seem to build with the current spec file, however. Everything seems to be under /opt/spotify/spotify-client/ instead of /usr/share/spotify/. I've tried editing the spec file myself, but haven't got it working, yet.