  We describe a methodology of rating the influence of a Twitter ac-count in
this famous microblogging service. We then evaluate it over real ac-counts,
under the belief that influence is not only a matter of quantity (amount of
followers), but also a mixture of quality measures that reflect interaction,
awareness, and visibility in the social sphere. The authors of this paper have
created InfluenceTracker, a publicly available website where anyone can rate
and compare the recent activity of any Twitter account.
