Klout has gained momentum and recognition in the last year, including new funding. However, the measurement values are being questioned by many which questions if they really are the defacto influencer tool. Check out the info on Oneforty.com, http://mar.gy/BU1x , to see other tools to use and consider when looking to see the value of you or your brand’s influence.
Challenge: run your own test with these tools plus Klout for the next 4 – 6 weeks. Choose one day per week to run the tools and take notes of the data. After 4 – 6 weeks see which tools gives you the most consistent information for your needs and how Klout changed in relation to that data.