Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess
User Experience and Experience Design !
Wood, Jed R. and Wood, Larry E. (2008): Card Sorting: Current Practices and Beyond. In Journal of Usability Studies, 4 (1) pp. 1-6. http://www.upassoc.org/upa_publications/jus/2008november/JUS_Wood_Nov2008.pdf