I think they were used a bit back in blog's heyday but they're probably too complicated for most bloggers to use, and those who do tend to be spammers. So the

I think they were used a bit back in blog's heyday but they're probably too complicated for most bloggers to use, and those who do tend to be spammers. So the analogy was perhaps bad. I want Diaspora to be the glue for the social internet, the way trackbacks are, albeit more elegantly.