I am also about to release a program with DataCrux at the heart, and would also like to express my thanks. You did an awesome job! Personally I decided on using DataCrux over CoreData because at the moment many people aren't going to jump away from Panther and that is a valuable user base; leaving them out isn't something I want to do. As a result, I chose DataCrux. Anyway, thank you very much for your code!