That's an interesting site,
Rapidshot 
Interesting for 8.33 it says
2 Sets of VHF Transceivers with 8,33 KHZ channel spacing
but those people who put in a GNS430 hoping that will do it will have to put in yet another 8.33 radio of some sort.
For me the solution would be to replace the 2nd KX155A radio with another KX165A... not cheap.
Also interesting what it says about PRNAV, which is a much more expensive dark cloud for IFR GA:
OPS approval required to fly P-RNAV
What OPS approval? GA is mostly non-AOC.
This bit
Currently being introduced (whilst no ECAC-wide mandate for the carriage of P-RNAV is foreseen, some States may require P-RNAV certification for IFR operations in notified terminal airspace).
For certain TMAs for aircraft that are not approved for P-RNAV operations conventional procedures may continue to be available as stated in national AIPs
is somewhat more encouraging because while it suggests that PRNAV will be limited to terminal airspace (TMAs?) which Europe is full of, it suggests that non-PRNAV traffic will be provided for. It has to be anyway because "State" aircraft will be exempted.