CKIPE... The Borderless Communicator
The Best and Most Complete Skype Statistics


History of Skype Users OnlineEntire database - Note the exponential growth
Real UsersMeasurements approximating "active" users and their location
Weekly VariationHighs and Lows on Weekdays vs. Weekends
Net Retention of Customers (real/nominal users)Skype has a "churn rate" of over 90%