We earlier discussed the analysis of Social Capital by PeerIndex. Another Social (Twitter) metrics analytics service is provided by Twitalyzer. Given a Twitter user, one can retrive a number (about 30) metrics on user behavior including Impact, Engagement, Generosity, Signal, and many more.

How these terms translate into what they really mean is still fuzzy. How pertinent these metrics in different contexts is also another debate. Nevertheless, Twitalyzer seems to provide a fair amount of user data, illustrated by time series and trends.

You also have (given an Agency account currently priced at 100$/month) access to some API access and ‘automatic discovery‘.