A lot of instrument Helicopter Point in Space (PinS) procedures have been done for the Norwegian Air Ambulance. These PinS procedures go to most hospitals. Also an entire IFR route structure is being set up, specifically for helicopters, to link the the arrival procedures at the various hospitals. From what I heard, it has been done by two companies Aurinko and ASAP. In Norway helicopters have great problems with icing so require the lowest minimums possible.
I also heard, that they are designing helicopter IFR arrivals and Standard Instrument Departures in New Zealand