Isn't Amigaworld evidence of fragmentation with its clear favoured status to the AmigaOne?
Isn't mophzone.org evidence of fragmentation with its clear favoured status to the Pegasos? :-P
IMO we need both general Amigoid sites (ie A.org, ANN) and more specialised ones (AW, MZ)
I'm sure that the platforms will seperate more as time goes on, but just remember that they are all very compatible with each other and will continue to be so untill MOS's QBox is more popular than the ABox and A2G is more popular on OS4.x than A1G (don't ask me about AROS's long term plans once they have a complete 3.x API). Until then, people can program using OpenAmiga so everyone benefits.