Blog Reading

I was talking today with a friend about some people who don't normally read blogs reaction to some stuff that another friend wrote on their blog. Brought us to a point in the convo where we wondered whether there was anything around to help some new to reading blogs understand blog etiquette. From my brief looking around there is stuff for people new to writing blogs and much on commenting etiquette but where would you send people to understand the subtleties of blog world and a grid to read through???