For the yaifo release accompanying OpenBSD 4.3, I decided to match OpenBSD's version number. From this point forward, only one version of yaifo will be active. I will not backport updates for older versions of OpenBSD... who is "upgrading" to older versions anyway? So the current OpenBSD release and some recent version of -current will be supported.
You can download Yaifo 4.3 from SourceForge.