Hey, does OS4 have PPC TCP/IP stack now? 
If it does it is probably in beta stage 
Bad thing to mention, iti. ;-) OS4 will have a complete and fully functional TCP/IP stack called RoadShow, afaik done by Olaf Barthel, not a name you associate with dodgy software. I think it'll probably be more complete than OS4 when it arrives...
As for MOS...it's has no standard TCP/IP stack yet. See what I mean when I said bad thing to mention? ;-)