The key issue here has always been the perception of the market for such a tool compared with the cost of developing and testing the tool for the platform. Clearly, some of the development people involved are sympathetic to the idea, but can't convince the bean counters to allocate funds to the program. My guess is that this is because the people who would like this capability are only a small fraction of independent consultants, ones who either work primarily on ChUI or who have specialized practices that allows them to not have to deal with UI. To tip the balance, we need some large shops, either ISVs or large support organizations to be lobbying for Linux as a development platform. Of course, if Linux ever became important as a deployment platform for the client, that would do it in a moment, but I'm not going to hold my breath on that.
Like anything else, the thing to do is to lobby your salesrep and hope that he or she will forward the request up the chain and result in enough critical mass. That, and keep showing up at Info Exchanges and voting for it.