Billing etc are not in scope. If we can get the basics agreed on
(compute, storage, network), then billing will become something we can
talk about.
This view, while seemingly justifiable, is rather short-sighted. Further, by putting the blinkers on now we are encouraging others (e.g. SNIA) to do the same. Given our place at the head of the cloud computing timeline we'd be basically marching everyone towards a corpse-littered battleground of standards - I've not heard a single coherent argument as to why this would not be the case and how this is any different from the myriad blikered and often competing efforts of WS-*.
I agree billing is not in scope now, but it is a pain point that is of a high priority so it will be in scope before long - once problems are solved focus changes quickly and we need to be able to adapt.