I've proposed a solution, similar to what you suggest, reduce subsidy at a certain point and hard fork..
But as I've said, i can implement anything, but it requires an executive decision from the CEO and owners of GPUCoin LLC. Without that I cannot make these kids of economic changes.
Ok, this is (probably) crazy.... but... what if the currency was re-issued at 1/100th the volume of this one (200 subsidy, 135M maxcoins, etc)? Is there some way current GPUC holders could convert to the new currency? I know that's a bit drastic and perhaps impossible practically but something has to be done and cutting the subsidy isn't going to be enough IMHO unless someone supports the price during the transition.