It just seems like there is a lot of sort of low-hanging fruit opportunity that the WMF could take advantage of if its serious about really addressing the issue. Why not hire an activist of sorts to be either a WMF employee or a grant funded contractor, who can develop initiatives, speak at conferences and to media outlets, etc.? Generate attention by participating in general tech communities and tech/education conferences open to gender panels and speakers, solicit reporting from news outlets and blogs, literally even place advertised invitations to edit in venues with high visibility to women.
That's the thing, imho, that's been missing from this list and from the WMF since the gender gap was identified as a serious (data supported) problem: big picture activism and effort. One thing we've realized as a community is that a lot of the small-bore outreach efforts don't work well, so why not devote more resources to large-bore recruitment? I'm not saying nothing has been done - indeed, Sarah and Sue and others have put a ton of effort out, but it appears to me that the WMF could be a lot more dedicated to it than it has been.