Finally .. some really new thinking: who is 'Rav Shagar'?

While here in Israel (leaving in a couple of days) I found a really interesting and original book - 'Kelim shevurim' (= "Broken Vessels") by Rav Sholom Gershon Rosenberg ("Rav Shaga'r"), head of Yeshivat Siach Yitzhak in Efrat. I have no idea who this Rav is, and can't find much on the Internet about him - but he is a really original and thoughtful thinker. (Can anyone give some info?)
The book is a collection of essays, most revolving around postmodernism and Judaism, especially as it affects the 'kipah srugah' (="k-s") community. His basic line is that all of the premises on which the relationship of the dati-leumi ideology and the State were founded no longer apply, and that the world of relativistic values and 'relativistic democracy' has irrevocably changed the Jewish religious world, and it is useless trying to explain our world-view in the old terminologies and categories. He also points out the implications for the religious community (and the religion) of the shift from the feeling that the religious duty of the knitted-kippah wearer is to the collective (characteristic of the old style Mizrachi pioneers, and of the post-67 mitnachalim) to the idea that the religious duty of the knitted-kipah wearer is to personal spirituality. One of the interesting essays explores changing dress styles in the k-s community of yeshivot and mechinot, ranging from whether the wearing of Reboks on shabbat signifies a changed mindset as well as a changing fashion to an analysis of the increasingly variegated headgear to be seen in the same institutions.
He does not, however, comment on the same changes among women. Last shabbat I spent in Modi'in, and davenned at a typical Israeli k-s minyan in a local school. The men, with very few exceptions, were in white shirts with k-s's. But after the davening I was struck by the clothing of the women. The fashion seems to be somewhat Bohemian/Eastern/hippie in effect -- close-fitting 'skullcap' type hats, colorful earrings, and very colourful, eastern-looking kaftans and robes. Some were wearing Indian-style tunics over trousers. What statement is being made here?? ("I'm conforming but I'm not conforming" ?)
Does anyone else know what I'm describing? What does it mean???? (I would add to that that I have also noticed a lot of ads from the same community, from the women, offering a whole range of 'alternative medicine'-type therapies -- reflexology, reiki, etc etc).

Comments?