Thanks to Chris for a clear and concise article on this matter. It is one that the RISC OS community needs to address sooner rather than later.
The two way satellite broadband I referred to is substantially funded by the Australian Commonwealth Govt to address issues of line quality in areas outside the major urban cantres. I can see that it will be the telephony service of the future as it will be cheaper than copper service once in place, and hopefully less prone to failure.
I for one would welcome the opportunity to support development of VoIP (recently mentioned as a possible development to Grapevine) via a Gimp Print/Firefox type scheme.
Once again thanks for the clarification of VoIP and RISC OS issues