It's been a while and AFAIK this is still unsupported.  Any updates on appropiate use, future support, or solid dates?

I agree, and I would like the option to release a game for free.  But, I think that by having a small fixed set of price points makes it easier for CG players to develop expectations for the quality of a game that they expect for each price point.  And (after playing the trial version) they won't buy games that don't meet those ...