if we really want to develop "some sensible measure of scholarly impact on the social Web" then we have to step back and consider three questions:\n\n * what do we want to measure?\n * what can we measure?\n * how can bring these two things close enough together to create something useful?\nThese two are clearly related, at least in the sense that someone's level of engagement in a community (their connectedness if you like) clearly increases the exposure of their work but is also indicative of the credibility they have within that community. Having said that, my gut feeling is that credibility, at least for the purposes of scholarly communication, can only really be measured by some kind of a peer-review (i.e. human) process.