PHPFB4 is "official", w00t!

The core files are no longer available in the downloads section of the Sourceforge project, as per the agreement with the Fusebox Corporation under which our involvement in the PHP port falls.

To access the core files, you can go to:
http://downloads.fusebox.org/index.cfm?method=Fusebox4.download

You have to supply an email address for the file to be sent to. To the best of my knowledge this email address is not collected at all, or used in any other context aside from delivering the file.