Richard Atterer, Monika Wnuk, and Albrecht Schmidt: Knowing the User's Every Move - User Activity Tracking for Website Usability Evaluation and Implicit Interaction (1,13MB, pdf). In Proceedings of The Fifteenth International World Wide Web Conference (WWW2006), Edinburgh, May 2006.
Richard Atterer: Logging Usage of AJAX Applications With the "UsaProxy" HTTP Proxy (220KB, pdf). In Proceedings of the WWW 2006 Workshop on Logging Traces of Web Activity: The Mechanics of Data Collection, Edinburgh, Scotland, May 2006
Monika Wnuk, "Usability Proxy for Websites" (1MB, pdf), Media Informatics Group, University of Munich, October 2005