Regarding screenmodes, you have to reboot once after you 'make' them in ModeEdit.
Yup, the pointer is a bit sluggish sometimes, and browsing my disks is slow (probably due to 68k PFS). The lack of Icons in the MorphOS directory annoys me, so I'll have to fix it... Voyager seems faster than on 68k, but I haven't used Voyager on 68k for a loong while (IBrowse is much better IMHO), I guess I'll try AWeb sometime too.
And I will definately get rid of the drive-clicking....
But still, this is definately worth the time.
-Paul
EDIT: SysSpeed results
OS3.9: 68k 80 MIPS, 32 MFLOPS PPC 271 MIPS 179 MFLOPS
MOS: 68k 9 MIPS 11 MFLOPS PPC 270 MIPS 178 MFLOPS