The first builds for the newly HALO enhanced Paranoid Android builds have begun rolling out to the Nexus family. The Nexus 4, 7, and even the Galaxy Nexus, now have builds where you can try out the new HALO notifications. My jealousy ensues.
These builds are considered alpha builds still, so things might not work as smoothly as they eventually will. I am sure it will not be too bad though, so hit the links below to download which ever Paranoid Android ROM you need. Let us know how you like HALO.