...but it's difficult when the rest of the world (including the people who are ostensibly trying to solve the problem) is busy conspiring to convince them that IT isn't for them.
Girls tend to as much of an interest in math and science as boys until fairly early on in grade school (I feel like it was 3rd grade or so). It seems to me that there's a lot of cultural pressure -- much of it from women -- pushing young girls away from STEM fields and into other areas of study. The aforementioned people who are ostensibly trying to solve the problem are blaming the IT industry, when in fact this happens much too early for the supposed culture of IT to have much of anything to do with it. Get girls and young women interested in IT and get people used to seeing them interested in IT, and the cultural issues will age out of the population as young IT professionals grow up used to being surrounded by both men and women.
The trouble is that the primary group of people looking into this issue is that they start out with the conclusion that men are uniquely at fault for the gender gap in IT and then go looking for evidence to support that,