I think that class is obviously linked to feminism in that working class women are more subject to sexism as a consequence of not having a higher income to protect them. Feminism is also linked to class in the sense that overwhelmingly, poor adults are women.
In terms of feminism being middle class, I don't think it is - grass roots feminism is often organised by working class women. I think the idea that being educated makes you middle class is in itself sexist. Many university educated women will be on lower incomes than a male plumber, yet the women are denounced for being 'middle class.' We have to start associating income more with class in this country.
In terms of educated women excluding less educated women, I think that is rather spurious. There are lots of feminist discussions going on - it is horses for courses. On a discussion board there should be room for discussions at all different levels of knowledge in different areas.
I also hate this idea that we should consider working class people to be uneducated. How and why has this happened? In my Grandfather's generation, before free state education, working class people like him made damn sure they educated themselves, through reading and libraries, trade union groups, the Worker's Educational Association, evening classes, co-operative groups and so on.
So, I am not going to assume that simply because someone has not been to University they are unable to understand levels of argument that are no more complex than those my Grandfather read by Proudhon, Marx and Charles Dickens. If lack of education is holding working class women back from understanding political arguments put forward by feminists, then by the effort of all feminists, from all class backgrounds, we need to make sure women become more educated. It is education levels that need to change, not the complexity of radical political arguments.