Previously we have heard talks about Compiz 0.9.0 being done by the end of this year, and then less than a month ago there was a blog post by one of the developers that reads, "Considering that there is only the group, animationaddon, stackswitch, 3d, atlantis and dbus remaining to port, I would hope that we can get a 0.9.0 out before $FESTIVE_HOLIDAY. I’ll be running through some of the other improvements that come with the new architecture before the release. My free time will increase *a lot* after Dec 4."
Well, $FESTIVE_HOLIDAY is coming up (likely referring to Christmas or New Years), but there hasn't been any new Compiz announcements recently to either confirm or deny these release plans. Compiz continues to be worked on as you can see from their Git repositories, but with no new tagged development releases for 0.9 since August, it would be a bit surprising if they jumped immediately to a 0.9.0 release.
When any new release is made or we hear any other details, we will be sure to pass them along.