> what do you think of what Skud said, about interest and involvement being the same?
I think that "lack of interest" is not a good metric, as I think there are a lot of social pressures at play outside of Free Software which cloud "interest" to the point where it's meaningless. Similarly with male "interest" in traditionally female-dominated professions like nursing - have you ever considered whether you were interested in nursing? It doesn't even cross most guys' minds.
That said, of the few women who are already explicitly interested, not all are already involved. I know for a fact that there are women who are already doing CS / IT / programming work in various capacities who look at what kind of crap takes place in free software and say "thanks but no thanks".
> Do you think there are actually women who are interested (as in, working with the code, and who would really like to contribute), but not involved in the projects because they tried and hit a barrier?
I think there are both men and women who have been interested but have hit barriers and not gotten involved. I personally know examples of both. I think there are additional barriers to women's participation relating to the various things that have been discussed over this thread - being hit on, being talked down to, being harassed, etc, which men don't deal with to the same degree or at all, in some cases.
I hope that answers your questions. I'm watching the RSS feed of the comments, let me know if it brings up new ones :)