I know I'll probably get flamed for this, but a 68k port seems kind of pointless. Since OS4 and MOS is PPC-based, go for a PPC port. Porting a huge project like this for a dead cpu (68k) is not time well spent IMHO.
Not only would Mozilla benefit from the PPC cpu, it would also encourage and motivate people to buy an A1 or a PegasOS.
