I do not think using a third party service would be a good idea if this idea/project was to be accepted by companies they would possibly be stepping over copyright AND if it was to work I would want the companies to host the currency's main wallet and for them to establish full control from there. using a 3rd part tool introduces restrictions that companies may not be willing to follow.
i would use idea's from their software/ways of doing things but it would be software/freeware that was built from the ground up to allow companies full control over currencies that they are creating for whatever reason they may want it for.