While it appears some Android apps have sprung up, some of it is apparently early beta software. There is also an issue for Cyanogenmod. With Mobile OS updates few and far between, Google an Apple apparently have not yet commented on the matter. And, while WP7 and RIM devices do not appear to use DigiNotar, one would likely suspect they are equally prone to slow updates should a CA they do use become compromised.
In the meantime, what are users to do to help protect themselves? What steps are even necessary?"