Re: Ethicoin is coming: Ethicoin's purpose is to improve the condition of humanity
The 50% was eventually decided as a means of distribution to give miners more % for deciding to mine Ethicoin, than BTC miners currently earn mining DVC.
I think it's always better to look for a way that a parameter, such as 50% in this case, can have the chance to adjust itself or self-organize in some way instead of being given by initial guesses of what will work the best.
The foundation of the how the 50% will be distributed can be seen in DVC's code and concept of receiver files; we are still ironing out the details but these will be well and truly resolved before the official ANN thread. As discussed above we will also give plenty of time for projects to apply to be on the receiver files before launch.
I really applaud your efforts. But make note of how Bitcoin leverages competition, "greed" and the inventiveness of individuals to self-organize into something great.
Looking forward to the emergent AI driven self organizing cryptocurrency you mention 
Not much is needed! Bitcoin is already a self-organizing open source currency. With Devcoin one can begin to understand how to extend this technology to fund worthwhile projects. A key insight is to see that one can understand how this technology can fund its own improvement (i.e. growth).
Meta-ethically, one should remember that good ethics (ethical improvement) borrows a lot from perpetual commitment to truth and progress. This means that there should be brutal, "open-source" discussions about how to spend the money most productively and ethically. Discussions about worthwhile projects should have competition, "greed" and the inventiveness of individuals as input, and truth and moral action as output. That's true alchemy for real idealists!
(I'm not much of an idealist myself, but I love new, revolutionary and exciting ideas and this idea is absolutely awesome. FinShaggy is my hero just for having the audacity to glimpse the potential.)