[Air-L] Alternatives to Wolfram alpha?

dear all - I am part of an 8 person team from UCL going out in April to study the impact of social networking sites in 7 countries over the next 15 months. (You can find more about our project here: http://ow.ly/1MZJcg ) All of us are following this list now and would like to ask a question to those conducting research on Facebook. We need to find a way of calculating the top twenty five people who interact with a person's facebook profile. We assume we can only do this with respect to postings, rather than chat or private messaging (unless someone knows otherwise). We are aware that Wolfram Alpha does this for comments but it would be better to include likes, sharing etc. Any suggestions welcome. Many thanks juliano spyer