As the guy who started Zune a long time ago on Amiga (okay, like 3 classes, I stopped before getting to the windowing/drawing part) then on Linux, and who still introduce new bugs in it on AROS (although I didnt touch the AmigaOS backport and subsequent improvements that resurrected Zune from the dead Linux GUI toolkits - thanks Sebastian!), I feel qualified to say: stay away, citizens, this is very alpha software and a lot of the MUI features you love and cherish aren't there (like testing in real time your new prefs on all open apps, or Arexx support), and I for one would never ever replace MUI 3.8 on my A1200 with that slow piece of incompatible crap (okay this is exagerated) that is Zune. This is insane! It's like willing to replace AmigaOS with AROS. Fine, but not before "a couple" of years. So instead of you trying Zune then saying "this is uber ####e" ... Oh well, I warned you!
dont expect MUI4, but instead an hybrid between MUI0 and MUI3
And respects to Stefan Stuntz for this awesome piece of one-man-work ! Without MUI where would we be today ?
edit: furthermore, zune-amigaos is a static library so you need to recompile the apps. Feel free to contribute the shared library version