AFAIK MorphOS 2 is under development and will support Efika.
thats not what i have heard...
I remember the developers mentioned it a while back, and I don't recall reading anything to say they had stopped development.
Wikipedia still refers to a MorphOS version in development for Efika.
I do agree that they need to make OS4 available for Sam, given that it's available (unlike the A1.) Indeed if I had to choose I would prefer to see OS4 for Sam than Efika. However it would be nice if OS4 supported as wide a range of PPC hardware as possible.