Lennart Poettering has shared a bunch of changes that have been made in his systemd world in recent months.
It's been a while since his previous systemd status report, but on his blog
he shares the current state of systemd. His short, incomprehensive list on this System V init daemon replacement lists 65 changes that have been made.
The work ranges from changing the license to LGPLv2.1+ (from GPLv2+), documentation improvements, a virtualization detector (systemd-detect-virt), support for setting system-wide environment variables from the kernel command-line, udev has been merged into systemd, the systemd journal is turned on by default, there's various SELinux-related items, and much more.
We'll see in just a few weeks at the Ubuntu Developer Summit in Oakland whether Canonical will change to systemd for Ubuntu 12.10 (it probably won't happen). Meanwhile, other Linux distributions leveraging systemd include Fedora, openSUSE, and Mandriva / Mageia.