Hey - we have been testing a service broadcast addition to the API locally but it will not be released until we can make it faster.. so maybe a few weeks.
At the moment you need to loop through your subscribers and send notifications to each. Sorry for the inconvenience!
Still waiting for more information on this.. At this point I cant even figure out a way to get a list of users with the api.
Seems like this feature has been in development since around this time last year... I wished there was away to get something going now.. It seems like we wont be able to make full use of services till something that seems so simple is in place...
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