Xperia play GSM only for now, it's based on the latest Android 4 ice cream sandwich, it's the most stable for now, a complete rebuild and have nothing to do with the leaked version from SE.
The only thing that's not working for now is the camera, but everything else is superb, as long as I know for now.
but you might encounter some trouble.
Official full post - check regularly
how to install:
follow the post by Kent just replace with this files instead