For Ubuntu 13.04, systemd-services (containing hostnamed, localed, and timedated) is installed by default. For 13.10 we expect that logind will also be installed by default. Those services contain much of the user-visible parts of systemd. As for using systemd by itself as the default init, that is WONTFIX for the forseeable future as the Ubuntu Foundations Team use upstart instead.
I'm going to go ahead and mark this bug fixed.
For Ubuntu 13.04, systemd-services (containing hostnamed, localed, and timedated) is installed by default. For 13.10 we expect that logind will also be installed by default. Those services contain much of the user-visible parts of systemd. As for using systemd by itself as the default init, that is WONTFIX for the forseeable future as the Ubuntu Foundations Team use upstart instead.