The latest edition of Psychosomatic medicine, contains a series of articles on issues surrounding the development of the DSM. The current version is DSM-IV and DSM-V will not be published until 2012.  

The first Diagnostic and Statistical Manual of Mental Disorders (DSM) was developed between 1946 and 1951, just after World War II. Over the years updates were published. With DSM-III introducing diagnoses to be placed in a multiaxial format, in which preexisting personality disorders or mental retardation, concomitant medical conditions, stressors, and functional capacity were included. Major features also included the naming of conditions as disorders, a term chosen deliberately as etiologically neutral, the listing of sets of specific, defined criteria to be used as the basis for diagnosis and the organisation of diagnostic categories in a hierarchy. In addition, the psychophysiological disorders category was removed and replaced with a psychological factors affecting physical conditions category.

The American Psychiatric Association have a web site to update professionals and the public about the plans for DSM-V 

Worth a look:

Narrow WN, First MB, Sirovatka P, Regier DA, editors. Age and Gender Considerations in Psychiatric Diagnosis: A Research Agenda for DSM-V. Arlington, VA: American Psychiatric Association; 2007.

Web Directions:

Psychosomatic Medicine 169, 9 (2007)

DSM-V Prelude Project: Research and Outreach