Teamwork is great, but not at the expense of whatever it was you were doing in the first place. The different Amiga-like platform projects in development are different because people had honest disagreements about which way things should go, not because they just haven't thought of combining their efforts, and that should be respected. Besides, they can still benefit from each other - the open-source Kickstart that the AROS folks wanted to run AROS on their 68k Amigas, for example, is providing NatAmi with a bootstrap by which they can run 68k software without having to pay licensing fees. As long as these groups keep an attitude of mutual amiability, they can benefit from each other's work without giving up what they are.