Less Wrong is extremely intimidating to newcomers and as pointed out by Academian something that would help is a document in FAQ form intended for newcomers. Later we can decide how to best deliver that document to new Less Wrongers, but for now we can edit the existing (narrow) FAQ to make the site less scary and the standards more evident.
Go ahead and make bold edits to the FAQ wiki page or use this post to discuss possible FAQs and answers in agonizing detail.
I've don't know of any relativists who aren't subjectivists. That article points out that non-subjectivist relativism is a logical possibility, but the article doesn't give any actual examples of someone defending such a position. I wonder if any exist.
The article does give an example: cultural relativism. Its objective in that it doesn't depend on the mind of the individual, but it's still relative to something: the culture you are in.