"Using Peter Steiner's famous cartoon as a context for his argument, Keith Harrison-Broninski turns his attention to Identity Management (IM), which, for many organizations, remains as bewildering as ever. In this Column, Keith discusses one limitation of all current approaches to IM. He argues that typical IM implementations do not do enough to support the primary occupation of most knowledge workers - collaboration with colleagues - and, he explains why this is an important problem. Read Keith's Column to learn how to supplement any IM system to provide support for the knowledge workers."