I've set up a temporary Beaker instance to demonstrate my proposed system page improvements [1] which will hopefully be landing in the 0.17 release.
The demo instance is here:
You can log in as "demo" with password "demo". There are no real systems or lab controllers attached, and no distros imported, so it's not a fully functional Beaker instance. But I created some dummy systems with a variety of permissions granted, so it's enough to try out most of the system page features.
If you're interested in the evolution of the system page, please take a look and reply with your feedback.
[1] http://beaker-project.org/dev/proposals/system-page-improvements.html