All in all, I believe it would be a good thing if all major Unix/Linux/BSD-libraries were to be ported, or OS4'ified. That includes glibc, pthreads, GTK+, and a few others. A proper X server would be marvellous. Of course, people should stop treating a new hypothetical glibc.library (a descendant of the infamous ixemul.library) like a thing to be avoided at all costs, and realise that the benefit of having easy access to a wealth of open source software far outweighs the 'disadvantage' of a program not being completely native. The idea is to use the computer and promote it, and if that requires a 'piggyback' on open source stuff, so be it. From what I read in the feature list of OS4, I think it will be considerably easier to port glibc than was the case under OS2 and OS3, anyway. In any case, port the above libs and programs, and GIMP itself should be a piece of cake. Which in itself would be a good program to have---but wasn't there already a good native PPC-program (ImageFX? Photoshop?) available?
By the way, if anyone from Hyperion is reading this, would you mind commenting on the idea and feasibility of porting the libraries mentioned above, in particular glibc?