@/all hoping to get the latest SystemJS 0.20 rc.1 release out v soon! Please please please if you haven't tried it out in your project do that now. As much feedback as possible would be great to ensure a smooth transition.
@gertsonderby jspm 0.17 will be upgrading immediately as well, but it is not currently available there. That's a great suggestion though actually, I'll add it to the next jspm 0.17 beta before the SystemJS 0.20 official release.