Getting back to your wishes, I think we have a bunch of socialists here who on a regular basis post critiques of the status quo from the left side (e.g. didn't we have a debate about guaranteed basic income recently?).
I didn't witness this debate, so maybe you're right that the advocates for the guaranteed minimum income were in fact socialists. I'd like to note, though, that the idea of a guaranteed basic income has had some currency in libertarian circles as well, advocated by (among others) Friedrich Hayek and Milton Friedman. So I wouldn't take support for this policy as very strong evidence of a socialist political orientation.
Well, I mentioned socialists because a significant part of LW self-identifies as socialist (see Yvain's surveys). That, of course, is a fuzzy term with many possible meanings.
A long blog post explains why the author, a feminist, is not comfortable with the rationalist community despite thinking it is "super cool and interesting". It's directed specifically at Yvain, but it's probably general enough to be of some interest here.
http://apophemi.wordpress.com/2014/01/04/why-im-not-on-the-rationalist-masterlist/
I'm not sure if I can summarize this fairly but the main thrust seems to be that we are overly willing to entertain offensive/taboo/hurtful ideas and this drives off many types of people. Here's a quote:
The author perceives a link between LW type open discourse and danger to minority groups. I'm not sure whether that's true or not. Take race. Many LWers are willing to entertain ideas about the existence and possible importance of average group differences in psychological traits. So, maybe LWers are racists. But they're racists who continually obsess over optimizing their philanthropic contributions to African charities. So, maybe not racists in a dangerous way?
An overly rosy view, perhaps, and I don't want to deny the reality of the blogger's experience. Clearly, the person is intelligent and attracted to some aspects of LW discourse while turned off by other aspects.